presented a contrast. Prior to World War II most, though not all, conservative Republicans were non-interventionists who wanted to stay out of the war at all costs, while most, though not all, Southern conservatives were interventionists who favored helping the British defeat Nazi Germany. After the war, a minority of conservative Republicans (led by Taft) opposed military alliances with other nations, especially NATO, while most Southern Democrats favored such alliances. During the post-war period, Republican presidents often owed their legislative victories to ad hoc coalitions between conservative Republicans and conservative southern Democrats. The liberal wing of the Democratic Party (elected mainly from Northern cities), on the other hand, tended to combine with Republicans from the west and the north to put their own legislation through. Decline and end Under President Lyndon Johnson, who had an intimate knowledge of the inner workings of Congress, liberal Democrats, together with Conservative and Liberal Republicans led by Senate Minority Leader Everett Dirksen, convinced all but six Republicans to vote for cloture on the Civil Rights Act of 1964. This vote broke a Southern filibuster led by Senators Robert Byrd (D-WV) and Strom Thurmond (D-SC). Though a greater percentage of Republicans than Democrats (about 80% versus 60% respectively) voted for cloture and for the bill, the 1964 GOP Presidential nominee, Barry Goldwater (R-AZ), voted against cloture; before his presidential campaign Goldwater had supported civil rights legislation but opposed the Civil Rights Act of 1964 on constitutional grounds, believing private individuals had the right to choose with whom they engaged in business. The GOP was massively defeated in 1964, but recovered its strength in the congressional elections of 1966, and elected Richard Nixon president in 1968. Throughout the 1954–1980 era the Republicans were a minority in both the House and Senate, but most of the time they cooperated with Conservative Democrats. In defining the size of the Conservative Coalition in 1964, one study noted that “As of adjournment Oct. 3, the potential strength of the conservative coalition was 56 of the 100 votes in the Senate and 280 of the 429 votes in the House (there were 5 vacancies and the House Speaker is not counted because he rarely votes). This constituted a winning majority in each chamber. The figures are based on a lineup of 33 Republicans and 23 Southern Democrats in the Senate and 176 Republicans and 104 Southern Democrats in the House. Counting