Representative Robert Linlithgow Livingston is in some ways a typical Republican -- pro-defense, pro-business and anti-abortion. But Mr. Livingston, the Louisiana Republican who is expected to replace Newt Gingrich as Speaker of the House, also has a black belt in karate and moods to match. When angry, he is known to shout, turn red and flail his arms. Friends and adversaries alike say these outbursts are usually done for effect, and when they are over, he will catch someone's eye and laugh.

Mr. Livingston, 55, a lanky Louisianan with an aristocratic New York pedigree, is vowing to keep his cool if he assumes the Speaker's post, second in line to the Presidency after the Vice President.

Members of both parties said that Mr. Livingston would probably have little effect on the Republican policies that have emerged over the last four years, but that he would put less emphasis on the social issues.

Some conservatives worry that Mr. Livingston will prove too conciliatory to Democrats. Others fear that, as a manager, he will narrowly focus on details and forgo the role of inspirational leader.

Man in the News, page A24.

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