The radicals are already fuming over impeachment plans being shelved. They want revenge and they want it right now. They also are going to want to cut off funding for the war right now but that's probably not going to happen on their time table. Soros and MoveOn committed big resources and they are going to want a quick return on their investments in terms of activist legislation. Well, there's going to be some disappointment there because conservatives can stil delay and block legislation (just like the Dems did) but the radicals won't want to hear any excuses on why their pet legislation is not getting through. And so on. The point is the stage is getting set for some hand to hand combat within the party. The Dems are not going to be one big happy familiy. This brings to mind Will Rogers' famous quote: I don't belong to any organized party, I'm a Democrat.
Even FDR had to deal with being blocked by one branch he didn't control the Supreme Court and when he said he intended to gain control of it, even Democrats voted against him,putting back into office almost 100 Republicans, and throwing out a lot of New Dealers.
We are a nation of checks and balances and not dependent on the whims of the People or politicans.