Don’t they need 67 votes for that to happen?
No. There's a parliamentary procedure involving a point-of-order that would allow them to do away with the filibuster. It goes WAY back to the early 1800s. This is what is known as the actual "nuclear option"
If they do this, it will destroy the comity in the Senate for the next two generation - perhaps permanently.
Nope FReeper friend, simple majority vote for a Senate rule change.
I think not. They need two-thirds (normally 67) to convict in an impeachment, or to ratify a treaty, three-fifths (60) to end a filibuster, but a rules change can apparently be done with “half plus one” (51) if the proponents are willing to live with the resulting internecine (i.e. very bloody) warfare. Since many RATs know they’re about to “die” anyway, they’re willing.