They'll negotiate a bunch about the number, maybe knock it down a bit, but if parliamentarian okays the immigration provision then the two problem children will hold their noses and vote for it. Neither of them came out against the immigration provision, only about the overall cost of the bill.

They know that they need legislative victories or the midterms will be a huge bloodbath. They can actually hold through the midterms just because the senate map doesn't look all that awful - Democrats are defending shaky seats in AZ and GA, meanwhile Republicans are defending WI, PA, OH, FL, and NC. Come midterms they need a list of "Here's all the shit we managed to do", you can only run on promises if you're the minority.

Also Breyer needs to fucking retire and get replaced because the turtle won't let Biden appoint a replacement.