I think they’re putting in a refundable tax credit, ie, a payment from the U.S. treasury directly to people (not necessarily even citizens) whether they’ve had a tax liability or not that they’re supposed to use to buy insurance. It’s a federal welfare check and is unconstitutional meddling.
A tax deduction for health insurance premiums would probably pass constitutional muster if there are no mandates or strings attached (until we repeal the 16th amendment and abolish the income tax, that is).
It looks like a vote today is getting less and less likely. One guy I heard said no way he’s voting for anything that isn’t written on paper yet. I certainly agree with that.