I think then though the party was united for the 48' election, the Democrats are already in shambles and with the media of today any internal uprising will get overplayed and could lead to the party splitting in two.
This just sounds like wishful thinking on your part. Besides, if you believe the Democratic party is in a "shambles", I dread to think how the GOP must seem. Since their disastrous 2006 elections, their President's consistently awful approval ratings, and now outright intra-party civil war over the immigration bill, it's the Republicans who are closer to an "internal uprising".