Wrapping up a fawning interview with Massachusetts Democratic Senator Elizabeth Warren on MSNBC's The Last Word Wednesday night, left-wing host Lawrence O'Donnell couldn't hold back his glee at Warren proposing her first piece of legislation. Like an adoring fan, he gushed: "Congratulations on your first bill. If I could just get your autograph here on my copy of the first Warren bill, this is a very exciting night at The Last Word." [Listen to the audio or watch the video after the jump] As she happily signed her name, Warren exclaimed: " For Lawrence, you bet." O'Donnell announced: "This will...