If it did get slipped in, do they have to pass it back to the house ?
I don't think it's in there. But if these things get put into a bill for one body and not the other, they get worked out in committee, where they are compromised on. I suspect, with Dems controlling both bodies, they could succeed in putting it into the other that didn't have it (the House). However, their are procedural stops that the rupublicans could employ...Just as the Dems held up many Republican bills at committee.