In foreign affairs, he backed the Eisenhower Doctrine in the Middle East and pressed for more foreign military and economic assistance. He voted in 1964 for the [[Gulf of Tonkin Resolution]] but later became critical of President Johnson's handling of the [[Vietnam War]].<ref>{{cite book | In foreign affairs, he backed the Eisenhower Doctrine in the Middle East and pressed for more foreign military and economic assistance. He voted in 1964 for the [[Gulf of Tonkin Resolution]] but later became critical of President Johnson's handling of the [[Vietnam War]].<ref>{{cite book |