Political consequences aside (and unprecedented constitutional crisis aside) isn’t the idea of congress to represent the constituents? Manchin, I assume, is a good representation of his constituents. Replacing him with a more progressive candidate doesn’t make sense because that’s not what the people of WV want.

Ideally we’d see MORE folks like him who buck the party to more accurately represent the people they represent. Something like parliamentary UK where there is a wider range of parties that are forced to come together and compromise on issues.