McCain stayed constant as Congress became more polarized

Sen. John McCain never wavered too much in how often he broke ranks with the GOP, but over the course of his Senate career, his colleagues became much more partisan in how they voted: https://t.co/Mb4S2odlcO via @FiveThirtyEight pic.twitter.com/iHsDra6jab

— ABC News Politics (@ABCPolitics) August 27, 2018