I am not so sure... West Virginia elected Manchin even after he co wrote the major democratic gun grab legislation. Maybe now since they rid themselves of union slavery, there might be hope. Just not likely considering their voting history.
No, Munchkin committed that treason AFTER the 2012 election. Manchin was actually endorsed by the NRA, and given an "A+" rating in both 2010 and 2012.
I think he's in danger; he will face a primary challenger, and the challenger is almost guaranteed to be even nuttier than he is. I give 50/50 for his re-nomination by the 'Rats, and better than 50/50 for re-election if nominated. WV Republican Party has its collective head up its ass; no clue how to run a statewide campaign.
Capito won in 2014 mainly because her opponent was completely bat-guano crazy, and not well known.