What moderate or centrist wing?
RINOs probably.
My exact thoughts. There is the left wing and the lunatic fringe wing. And it's the lunatic fringe that is causing most of the problems.
You beat me to it!
Who the hell is moderate or centrist in that gaggle of communists and weirdos who call themselves the “democratic” party?
The Stalinist (liberal) and Marxist (moderate) wings.
The blue collar whites who voted for Obama in '08 and '12 and switched to Trump in '16. They used to be the backbone of the Democratic party.
It's entertaining to lurk over at DU and see this infighting first-hand between the people who want to win these white voters back and the far left who says, "We don't want a bunch of racist, homophobic Trumpers in our party!" and then promote a "marginalized groups" outreach strategy that will see them winning California by 5 million votes instead of 4.5 and lose the battleground states by even larger numbers.