Changes

===Cold War===

===Cold War===

During World War II, the internationalist wing of the GOP gained strength, as former isolationist Arthur Vandenberg switched sides.<ref>James A. Gazell, "Arthur H. Vandenberg, Internationalism, and the United Nations". ''Political Science Quarterly'' 1973 88(3): 375-394</ref>  The Republicans controlled Congress when it approved the [[Truman Doctrine]] in 1947 and the [[Marshall Plan]] in 1948.

During World War II, the internationalist wing of the GOP gained strength, as former isolationist [[Arthur Vandenberg]] switched sides.<ref>James A. Gazell, "Arthur H. Vandenberg, Internationalism, and the United Nations". ''Political Science Quarterly'' 1973 88(3): 375-394</ref>  The Republicans controlled Congress when it approved the [[Truman Doctrine]] in 1947 and the [[Marshall Plan]] in 1948.

The leaders of the anti-isolationist or "internationalist" wing were [[Dwight D. Eisenhower]] (president 1952-60), and [[Richard Nixon]] (president 1968-74).  Conservative leader [[Barry Goldwater]] in 1964 rejected isolationism and called for an aggressive [[Rollback]] strategy to defeat Communism, a policy followed by [[Ronald Reagan]] (president 1980–88).   

The leaders of the anti-isolationist or "internationalist" wing were [[Dwight D. Eisenhower]] (president 1952-60), and [[Richard Nixon]] (president 1968-74).  Conservative leader [[Barry Goldwater]] in 1964 rejected isolationism and called for an aggressive [[Rollback]] strategy to defeat Communism, a policy followed by [[Ronald Reagan]] (president 1980–88).