Sounds like a deal! 🙂

my bet is that democrats pick up +3 seats and fetterman decides to either caucus with the Republicans or at minimum threaten to spoil every vote.

Assuming no Republicans cross the aisle. That's a fairly reasonable assumption today because the Republican party has been purged of anyone who would be willing to cross Trump.

But I suspect that assumption might not remain so valid if we were to see the kind of blue tsunami it would take to get anywhere near 2/3 of the Senate. Even if you only had 64 seats instead of 67, that still means almost every state went blue, including most of the deep red ones. Any politician with basic survival instincts is going to recognize that tying themselves to the lame duck president that has practically destroyed their party is not going to be a good long term strategy.

It's not much more plausible a scenario than one where Dems win a full supermajority, but if it were to happen, I would be shocked if every single Republican chose to go down with the ship.

The key part to impeachment is the vote to convict. That's where his prior impeachments failed. In my fantasy where they had 2/3 of both houses they could do it, sure, but my comment was kinda joking - I'm not sure there are enough seats up for election in this cycle for them to get to that point even if they won everything.

He’s been impeached three times already. It doesn’t carry any weight anymore.