DNC chair when there was a net loss of 63 seats in the House.
And you think that's his fault?
Oh that's right, no one in power is ever to blame. It's all the "professional leftists' faults".
Those losses came in a midterm rocked by a large recession and other image problems for the Democratic party, including in terms of policy (PPACA). It was pretty much a given they were going to lose seats, following WH party's midterm loss tradition and the fact that many of those seats were R+'s. Democrats were way too overextended.
You can't just point to the top and blame them for everything. Sometimes there is nothing that can be done. Could Kaine and Obama have acted in ways to mitigate the damage? Of course. Could they have avoided large losses altogether? Probably not.
Though if you're going to point fingers like that, then why? What did he do wrong? What didn't he do that he should have? Do you think that those losses could have been avoided entirely? Surely you have some reasons here if you're going to blame someone for it.
The left was constantly attacked in 2010 by Rahm Emanuel and the like. Obama's defenders always said he was playing 11 dimensional chess or some nonsense like that. Well, I don't think they could have done worse than lose 63 House seats if they listened to the left. We didn't even get a weak public option for crying out loud.