The House version of the Civil Rights Act of 1964 was supported by only 61 percent of that Chamber's Democrats versus 80 percent of the Republicans.
More importantly, it was Republicans that ended a Democrat filibuster preventing a vote on this bill in the Senate. 82 percent of Republicans voted for cloture versus 66 percent of Democrats.
In the final Senate vote on the Act, 82 percent of Republicans voted "Aye" versus 69 percent of Democrats.
The same is true for the Voting Rights Act of 1965 when 94 percent of Senate Republicans voted in favor of the bill versus 73 percent of Democrats. The final vote on the House's version was even more stark as only one Senate Republican voted against it compared to seventeen Democrats.
In the House, 82 percent of Republicans supported the bill versus 78 percent of Democrats.