Manchin votes with McConnell about half the time, because he has to pretend to be a democrat to stay in their caucus. Jenkins would obviously vote with McConnell far more often, so McConnell wants Jenkins instead. But neither Manchin or Jenkins are democrats, they are former democrats. It's just that Jenkins has gone full R while Manchin is taking a center-right tack atm.
That's not true and you know it. Manchin votes with Schumer and other liberal Democrats 90%+ of the time. Of course Schumer will allow him to vote for some of Trump's nominees as long as he doesn't cast the deciding vote. Heck, Manchin endorsed a presidential candidate who called the voters in his state racist, sexist deplorable scum. What further evidence do you need?
This is as stupid as saying Susan Collins is a Democrat.
Why is it so difficult to say the truth? Manchin is a moderate Democrat, but moderate Democrats are considered to be a "conservatives" in present day Democratic party. There are no more really conservative Democrats in high elected positions (even people like Jim Justice are moderate too) - not only compared with
really conservative Democrats of not so distant past (1960th - 1990th), but with such recent Democratic congressmen as Walt Minnick, Bobby Bright, Travis Childers and their like. Only in state legislatures and local offices we can still find a few resembling
real conservatives (and even them - usually moderate-conservatives). And vice versa among Republicans: Collins is a moderate even "the most moderate in whole caucus", but only by present day standards. She would be considered "somewhat right of center" in 1960th-1990th (surely - no comparison with Javits, Case or Brooke in Senate or Whalen, Reid and some other in House), and is "less liberal" then Morella, Shays, Boehlert and other, who served until recently. And even the most moderate Republican governors (Baker, Scott) are exactly that - moderates. Again - there are few left-of-center (up to moderate-liberal) Republicans in state legislatures and local offices, and that's all. It's so simple...