If past is any indicator, a Democratic “threat” to reform the filibuster is much like a Charlie Brown threat to go home if Lucy doesn’t play nice with the football this time. This isn’t the first time the Democratic leadership in the Senate has made noises about reforming the filibuster; it’s not even the first time they’ve admitted that they screwed up filibuster reform last time but are serious about it this time. Democrats always balk at the last minute, so don’t expect this to go anywhere. source