Today's vote in the Senate to curb the use of the filibuster has turned what was shaping up to be an "inconsequential" Congress into exactly the opposite, writes Ezra Klein at the Washington Post. "Indeed, this might prove to be one of the most significant congresses in modern times," he argues. "Today, the political system changed its rules to work more smoothly in an age of sharply polarized parties." If our political system is to avoid "complete dysfunction," we'll need more changes like it. Speaking of polarized parties, the move is generally getting rave reviews on the left and slams on the right: