Umm...
I don't care if you hate Manchin, no other Dem could really win WV. Same with Heitkamp in ND.
So no. She either loses the primary or the general in 2018. And is nowhere to be found by 2020.
No Democrat will win in WV, so you might as well vote your principles. That's the entire point. See my reasoning for supporting her here.
Heitkamp might be able to win. Not as many racist hicks in ND as there are in WV.
Manchin MIGHT be re-elected. Swearengin would require a miracle to get elected.
Will you be proud of your support if there are 50 Democratic Senators in 2019, but none from WV if Swearengin was nominated and lost?