 Collier was admired by colleagues in both parties, as he was excellent at finding compromise ground between two sides on issues.Collier voted in favor of the Civil Rights Acts of 1957, 1960, 1964, and 1968, but voted against the Voting Rights Act of 1965 and did not vote on the 24th Amendment to the U.S. Constitution.In 1975, Collier retired from Congress.