Jonathan Chait rubs his crystal ball:
The one real landmine here is that the Medicare buy-in provision for people aged 55-65 raises a lot of hackles among medical providers. They could mount a last-minute lobbying campaign to pressure Democrats to abandon this. Indeed, I wouldn't be surprised at all to see that happen. If that happens, you probably lose the Medicare buy-in but keep the trigger. Either way, the outcome is a historic health care bill.