Unless something goes pear-shaped.
Unless House Democrats remember that they, too, were elected to play a role in the lawmaking process instead of rubber-stamping the dictates of a handful of senators.
Unless Senate progressives think Joe Manchin or Kyrsten Sinema is going to stab them in the back on the forthcoming $3.5 billion reconciliation vote — the real prize — and opt not to be played for fools.
Unless enough senators realize that the bipartisan coalition is sufficiently fragile to need every vote it can get, and start tacking on wish lists of expensive demands for their home states.
Unless Senate Majority Leader Mitch McConnell finds an excuse to convince his caucus to blow up the deal at the last minute and blame Joe Biden or Nancy Pelosi or Chuck Schumer.