Those Dems are all in red, red-leaning, or purple states. You guys need to understand that a full on liberal cannot be run in every situation. Center left Dems will need to be a thing where appropriate.
Otherwise you can guarantee losing 3-4 seats just from those people alone.
TBH, those red state democrats can barely be considered centrists, let alone center left. It is only by some freak accident that they're democrats.
The vast majority of the electorate isn't going to remember if their senator voted yes or no on a cabinet pick in 2 years. I find this excuse really flimsy.
See above. That lot could easily change their allegiances to R and nobody from those states would bat an eye. I think Manchin even publicly discussed doing that very thing.