[DanZ]

“But the Dems aways unite in the general election — you don’t see Dem factions feuding and staying home, which is quite usual for GOP and conservative voters.”

DUDE, you are so wrong - remember the Blue Dog democrats who voted for Ron Reagen?

I vote FOR the person who shares my view of the world. I no longer vote for the lesser of two evils

[Ben Ficklin]

Also recall that Ralph Nader syphoned 80,000 vote away from Al Gore allowing Bush to carry Florida by 700 votes and take the presidency.

But, having said that, you also have to recognize that the leftwing turned out big for Obama in 2012 even though the left was not pleased with Obama's first term.