Another interesting tidbit....Reid and Pelosi became minority whips in 2002/2003. So outrage over Bush "stealing the election" (damnit, that keeps happening to the poor Dems!) caused the party to move considerably left. And outrage over Trump is a magnitude greater than that.
And before the usual suspects come in here and say "Obama caused the Repubs to move right". No, they didn't. The party moved right on the margins, and the Tea Party no doubt scared the establishment/moderate/progressive Repubs, but they never lost leadership. And after a few years, the Tea Party "rebellion" was put down and never amounted to much more than a nuisance. Sure, we have Trump now....but Michelle Bachman and Ted Cruz never took control of the Repub party, and that's the key difference.