Goldwater repeatedly introduced amendments to labor bills that would outlaw racial discrimination in labor unions, however, labor unions used their political influence to defeat Goldwater’s proposals. Goldwater voted in favor of both Civil Rights Act of 1957 and the 24th Amendment to the U.S. Constitution but did not vote on the Civil Rights Act of 1960. While he did vote in favor of it while in committee, Goldwater reluctantly voted against the Civil Rights Act of 1964 when it came to the floor. Congressional Republicans overwhelmingly supported the bill, with Goldwater being joined by only 5 other Republican senators in voting against it. It is likely that Goldwater significantly underestimated the effect this would have, as his vote against the bill hurt him with voters across the country, including from his own party. However, in the 1990s, Goldwater would later call his vote on the Civil Rights Act, “one of his greatest regrets."