Muslims, guns, Hillary and Obama: Republicans square up in first debate of 2016 as Trump and Cruz lock horns, Christie calls the president 'a petulant child' and EVERYBODY hates Clinton 

Jeb Bush       Former Florida governor

Age on Election Day: 63

Religion: Catholic

Base: Moderates                

Résumé: Former Florida governor and secretary of state. Former co-chair of the Barbara Bush Foundation for Family Literacy.

Education: B.A. University of Texas at Austin.

Family: Married to Columba Bush (1974), with three adult children. Noelle Bush has made news with her struggle with drug addiction, and related arrests. George P. Bush was elected Texas land commissioner in 2014. Jeb's father George H.W. Bush was the 41st President of the United States, and his brother George W. Bush was number 43.

Claim to fame: Jeb was an immensely popular governor with strong economic and jobs credentials. He is also one of just two GOP candidates who is fluent in Spanish.

Achilles heel: Bush has angered conservatives with his permissive positions on illegal immigration (saying some border-crossing is 'an act of love) and common-core education standards. His last name could also be a liability with voters who fear establishing a family dynasty in the White House.

Chris Christie        New Jersey governor

Age on Election Day: 54

Religion: Catholic

Base: Establishment-minded conservatives

Résumé: Governor of New Jersey. Former U.S. Attorney for the District of New Jersey. Former Morris County freeholder and lobbyist.

Governor of New Jersey. Former U.S. Attorney for the District of New Jersey. Former Morris County freeholder. Former statehouse lobbyist.

Education: B.A. University of Delaware, Newark, J.D. Seton Hall University.

Family: Married to Mary Pat Foster (1986) with four children.

Claim to fame: Pugnacious and unapologetic, Christie once told a heckler to 'sit down and shut up' and brings a brash style to everything he does. That includes the post-9/11 criminal prosecutions of terror suspects that made his reputation as a hard-charger.

Achilles heel: Christie is often accused of embracing an ego-driven and needlessly abrasive style. His administration continues to operate under a 'Bridgegate' cloud: At least two aides have been indicted in an alleged scheme to shut down lanes leading to the George Washington Bridge as political retribution for a mayor who refused to endorse the governor's re-election.

Carly Fiorina         Former tech CEO

Age on Election Day: 62

Religion:      Episcopalian 

Base: Conservatives

Résumé: Former CEO of Hewett-Packard. Former group president of Lucent Technologies. Former U.S. Senate candidate in California.

Education: B.A. Stanford University. UCLA School of Law (did not finish). M.B.A. University of Maryland. M.Sci. Massachusetts Institute of Technology.

Family: Married to Frank Fiorina (1985), with one adult step-daughter and another who is deceased. She has two step-grandchildren. Divorced from Todd Bartlem (1977-1984).

Claim to fame: Fiorina was the first woman to lead a Fortune 20 company, something that could provide ammunition against the Democratic Party's drive to make Hillary Clinton the first female president. She is also the only woman in the 2016 GOP field, making her the one Republican who can't be accused of sexism.

Achilles heel: Fiorina's unceremonious firing by HP's board has led to questions about her management and leadership styles. And her only political experience has been a failed Senate bid in 2010 against Barbara Boxer.

Mike Huckabee     Former Arkansas governor

Age on Election Day: 61

Religion: Southern Baptist 

Base: Evangelicals

Résumé: Former governor and lieutenant governor of Arkansas. Former Fox News Channel host. Ordained minister and author.

Education: B.A. Ouachita Baptist University. Southwestern Baptist Theological Seminary (did not finish). 

Family: Married to Janet Huckabee (1974), with three adult children. Mrs. Huckabee is a survivor of spinal cancer.

Claim to fame: 'Huck' is a political veteran and has run for president before, winning the Iowa Caucuses in 2008 and finishing second for the GOP nomination behind John McCain. He's known as an affable Christian and succeeded in building a huge following on his weekend television program, in which he frequently sat in on the electric bass with country & western groups and other 'wholesome' musical entertainers.

Achilles heel: Huckabee may have a problem with female voters. He complained in 2014 about Obamacare's mandatory contraception coverage, saying Democrats want women to 'believe that they are helpless without Uncle Sugar.' He earned more scorn for hawking herbal supplements in early-2015 infomercials as a diabetes cure, something he has yet to disavow despite disagreement from medical experts.

Rand Paul      Kentucky senator

Age on Election Day: 53

Religion: Presbyterian 

Base: Libertarians 

Résumé: US senator. Board-certified ophthalmologist. Former congressional campaign manager for his father Ron Paul.

Education: Baylor University (did not finish). M.D. Duke University School of Medicine.

Family: Married to Kelley Ashby (1990), with three sons. His father is a former Texas congressman who ran for president three times but never got close to grabbing the brass ring.

Claim to fame: Paul embraces positions that are at odds with most in the GOP, including an anti-interventionist foreign policy, reduced military spending, criminal drug sentencing reform for African-Americans and strict limits on government electronic surveillance – including a clampdown on the National Security Agency.

Achilles heel: Paul's politics are aligned with those of his father, whom mainstream GOPers saw as kooky. Both Pauls have advocated for a brand of libertarianism that forces government to stop domestic surveillance programs and limits foreign military interventions.

Rick Santorum     Former Penn. senator

Age on Election Day: 58

Religion: Catholic

Base: Evangelicals 

Résumé: Former US senator and former member of the House of Representatives from Pennsylvania. Former lobbyist who represented World Wrestling Entertainment.

Education: B.A. Penn State University. M.B.A. University of Pittsburgh. J.D. Penn State University Dickinson School of Law.

Family: Married to Karen Santorum (1990), with seven living children. One baby was stillborn in 1996. Another, named Isabella, is a special needs child with a genetic disorder.

Claim to fame: Santorum won the 2012 Republican Iowa Caucuses by a nose. He won by visiting all of Iowa's 99 states in a pickup truck belonging to his state campaign director, a consultant who now works for Donald Trump.

Achilles heel: As a young lobbyist, Santorum persuaded the federal government to exempt pro wrestling from regulations governing the use of anabolic steroids. And the stridently conservative politician has attracted strong opposition from gay rights groups. One gay columnist held a contest to redefine his name, buying the 'santorum.com' domain to advertise the winning entry – which is too vulgar to print.

REPUBLICAN DROPOUTS

Rick Perry, former Texas governor

     (withdrew Sept. 11, 2015)

Scott Walker, Wisconsin governor

     (withdrew Sept. 21, 2015)

Bobby Jindal, Louisiana governor

     (withdrew Nov. 17, 2015)

Lindsey Graham, South Carolina senator

     (withdrew Dec. 21, 2015)

 George Pataki, former New York governor

     (withdrew Dec. 29, 2015) 

Ben Carson       Retired physician

Age on Election Day: 65

Religion:              Seventh-day Adventist

Base: Evangelicals

Résumé: Famous pediatric neurosurgeon, youngest person to head a major Johns Hopkins Hospital division. Founder of the Carson Scholars Fund, which awards scholarships to children of good character.

Education: B.A. Yale University. M.D. University of Michigan Medical School.

Family: Married to Candy Carson (1975), with three adult sons. The Carsons live in Maryland with Ben's elderly mother Sonya, who was a seminal influence on his life and development. 

Claim to fame: Carson spoke at a National Prayer Breakfast in 2013, railing against political correctness and condemned Obamacare – with President Obama sitting just a few feet away.

Achilles heel: Carson is inflexibly conservative, opposing gay marriage and once saying gay attachments formed in prison provided evidence that sexual orientation is a choice.

Ted Cruz            Texas senator

Age on Election Day: 45

Religion:         Southern Baptist

Base: Tea partiers

Résumé:U.S. senator. Former Texas solicitor general. Former U.S. Supreme Court clerk. Former associate deputy attorney general under President George W. Bush.

Education: B.A. Princeton University. J.D. Harvard Law School.

Family: Married to Heidi Nelson Cruz (2001), with two young daughters. His father is a preacher and he has two half-sisters.

Claim to fame: Cruz spoke on the Senate floor for more than 21 hours in September 2013 to protest the inclusion of funding for Obamacare in a federal budget bill. (The bill moved forward as written.) He has called for the complete repeal of the medical insurance overhaul law, and also for a dismantling of the Internal Revenue Service. Cruz is also outspoken about border security.

Achilles heel: Cruz's father Rafael, a Texas preacher, is a tea party firebrand who has said gay marriage is a government conspiracy and called President Barack Obama a Marxist who should 'go back to Kenya.' Cruz himself also has a reputation as a take-no-prisoners Christian evangelical, which might play well in South Carolina but won't win him points in the other early primary states and could cost him momentum if he should be the GOP's presidential nominee.

Jim Gilmore     Former Virginia governor

Age on Election Day: 67

Religion: United Methodist

    Base: Conservatives

Résumé: Former governor and attorney general of Virginia. Former chairman of the Republican National Committee. Former U.S. Army intelligence agent. President and CEO of the Free Congress Foundation. Board member of the National Rifle Association

Education: B.A. University of Virginia.

Family: Married to Roxane Gatling Gilmore (1977), with two adult children. Mrs. GIlmore is a survivor of Hodgkin's lymphoma

Claim to fame: Gilmore presided over Virginia when the 9/11 terrorists struck in 1991, guiding the state through a difficult economic downturn after one of the hijacked airliners crashed into the Pentagon. He is nest known in Virginia for eliminating most of a much-maligned personal property tax on automobiles, working with a Democratic-controlled state legislature to get it passed and enacted.

Achilles heel: Gilmore is the only GOP or Democratic candidate for president who has been the chairman of his political party, giving him a rap as an 'establishment' candidate. A social-conservative crusader, he is loathed by the left for championing the state law that established 24-hour waiting periods for abortions. Gilmore also has a reputation as an indecisive campaigner, having dropped out of the 2008 presidential race in July 2007. 

John Kasich       Ohio governor 

Age on Election Day: 64 

Religion: Anglican

Base: Centrists 

Résumé: Governor of Ohio. Former chairman of the U.S. House Budget Committee. Former Ohio congressman. Former Ohio state senator.

Education: B.A. The Ohio State University.

Family: Married to Karen Waldbillig (1997). Divorced from Mary Lee Griffith (1975-1980).

Claim to fame: Kasich was Ohio youngest-ever member of the state legislature at age 25. He's known for a compassionate and working-class sensibility that appeals to both ends of the political spectrum. In the 1990s when Newt Gingrich led a Republican revolution that took over Congress, Kasich became the chairman of the House Budget Committee – a position for a wonk's wonk who understands the nuanced intricacies of how government runs.

Achilles heel: Some of Kasich's political positions rankle conservatives, including his choice to expand Ohio's Medicare system under the Obamacare law, and his support for the much-derided 'Common Core' education standards program. 

Marco Rubio         Florida senator

Age on Election Day: 45

Religion:          Catholic

Base: Conservatives

Résumé: US senator, former speaker of the Florida House of Representatives, former city commissioner of West Miami

Education: B.A. University of Florida. J.D. University of Miami School of Law.

Family: Married to Jeanette Dousdebes (1998), with two sons and two daughters. Jeanette is a former Miami Dolphins cheerleader who posed for the squad’s first swimsuit calendar. 

Claim to fame: Rubio's personal story as the son of Cuban emigres is a powerful narrative, and helped him win his Senate seat in 2010 against a well-funded governor whom he initially trailed by 20 points.

Achilles heel: Rubio was part of a bipartisan 'gang of eight' senators who crafted an Obama-approved immigration reform bill in 2013 which never became law – a move that angered conservative Republicans. And he was criticized in 2011 for publicly telling a version of his parents' flight from Cuba that turned out to appear embellished.

Donald Trump     Real estate developer

Age on Election Day: 70

Religion:     Presbyterian 

Base: Conservatives   

Résumé: Chairman of The Trump Organization. Fixture on the Forbes 400 list of the world's richest people. Star of 'Celebrity Apprentice.'

Education: B.Sci. Wharton School of the University of Pennsylvania

Family: Married to Melania Trump (2005). Divorced from Ivana Zelníčková (1977-92) and Marla Maples(1993–99). Five grown children. Trump's father Fred Trump amassed a $400 million fortune developing real estate.

Claim to fame: Trump's niche in the 2016 campaign stems from his celebrity as a reality-show host and his enormous wealth – more than $10 billion, according to Trump. Because he can self-fund an entire presidential campaign, he is seen as less beholden to donors than other candidates. He has grabbed the attention of reporters and commentators by unapologetically staking out controversial positions and refusing to budge in the face of criticism.

Achilles heel: Trump is a political neophyte who has toyed with running for president and for governor of New York, but shied away from taking the plunge until now. His billions also have the potential to alienate large swaths of the electorate. And his Republican rivals have labeled him an ego-driven celeb and an electoral sideshow because of his all-over-the-map policy history – much of which agrees with today's Democrats – and his past enthusiasm for anti-Obama 'birtherism.'

Hillary Clinton Former sec. of state

Age on Election Day: 69

Religion: United Methodist 

Base: Liberals 

Résumé:Former secretary of state. Former U.S. senator from New York. Former U.S. first lady. Former Arkansas first lady. Former law school faculty, University of Arkansas Fayetteville.

Education: B.A. Wellesley College. J.D. Yale Law School.

Family: Married to Bill Clinton (1975), the 42nd President of the United States. Their daughter Chelsea is married to investment banker Marc Mezvinsky, whose mother was a 1990s one-term Pennsylvania congresswoman.

Claim to fame: Clinton was the first US first lady with a postgraduate degree and presaged Obamacare with a failed attempt at health care reform in the 1990s.

Achilles heel: A long series of financial and ethical scandals has dogged Clinton, including recent allegations that her husband and their family foundation benefited financially from decisions she made as secretary of state. Her performance surrounding the 2012 terror attack on a State Department facility in Benghazi, Libya, has been catnip for conservative Republicans. And her presidential campaign has been marked by an unwillingness to engage journalists, instead meeting with hand-picked groups of voters.

Bernie Sanders*  Vermont senator

Age on Election Day: 75

Religion: Jewish

Base: Far-left progressives

Résumé:U.S. senator. Former U.S. congressman. Former mayor of Burlington, VT.

Education: B.A. University of Chicago.

Family: Married to Jane O’Meara Sanders (1988), a former president of Burlington College. He has one child from a previous relationship and is stepfather to three from Mrs. Sanders' previous marriage. His brother Larry is a Green Party politician in the UK and formerly served on the Oxfordshire County Council.

Claim to fame: Sanders is an unusually blunt, and unapologetic pol, happily promoting progressivism without hedging. He is also the longest-serving 'independent' member of Congress – neither Democrat nor Republican.

Achilles heel: Sanders describes himself as a 'democratic socialist.' At a time of huge GOP electoral gains, his far-left ideas don't poll well. He favors open borders, single-payer universal health insurance, and greater government control over media ownership.

* Sanders is running as a Democrat but has no party affiliation in the Senate.

Martin O'Malley    Former Maryland governor

Age on Election Day: 53

Religion: Catholic

Base: Centrists 

Résumé:Former Maryland governor. Former city councilor and mayor of Baltimore, MD. Former Assistant U.S. Attorney for the District of Columbia.

Education: B.A. Catholic University of America. J.D. University of Maryland.

Family: Married to Katie Curran (1990) and they have four children. Curran is a district court judge in Baltimore. Her father is Maryland's attorney general. O'Malley's mother is a receptionists in the Capitol Hill office of Democratic Sen. Barbara Mikulski.

Claim to fame: O'Malley pushed for laws in Maryland legalizing same-sex marriage and giving illegal immigrants the right to pay reduced tuition rates at public universities. But he's best known for playing guitar and sung in a celtic band cammed 'O’Malley’s March.'

Achilles heel: O’Malley may struggle in the Democratic primary since he endorsed Hillary Clinton eight years ago. If he prevails, he will have to run far enough to her left to be an easy target for the GOP. He showed political weakness when his hand-picked successor lost the 2014 governor's race to a Republican. But most troubling is his link with Baltimore, whose 2016 race riots have made it a nuclear subject for politicians of all stripes.

DEMOCRATIC DROPOUTS

Jim Webb, former Virginia senator

     (withdrew Oct. 20, 2015)

Lincoln Chafee, former Rhode Island governor

     (withdrew Oct. 23, 2015)