December 11 Funding Deadline: Why Congress Will Likely Dodge Another US Government Shutdown

The Democrats' sweep of Congress will not be tested first on January 3, when the new majorities take their seats. It will be tested on December 11, when the money runs out. The stopgap law signed on September 2, H.R. 6500, keeps every federal agency funded through that date, and if no new funding law is enacted by then, a funding lapse begins on December 12. The Congress that must prevent that is not the one voters just elected. It is the outgoing Republican majorities, sitting in a lame-duck session, with the Senate's 60-vote threshold meaning Democratic votes are needed for almost anything to pass.

The starting position is thin. None of the 12 regular spending bills for fiscal year 2027 has become law. The House has passed three of them, the Senate Appropriations Committee has reported none, and its chair and vice chair have not announced agreement on the overall spending total. Congress returns on November 9, which leaves only a few legislative weeks between the election and the deadline, and December 11 carries more than agency funding: surface transportation authority and National Flood Insurance Program authority expire on the same day, and health programme extenders are waiting to be attached to whatever moves.

I read the incentives as pointing, narrowly, toward a short extension into January rather than a shutdown or a full-year deal. A short extension is the one outcome both sides can accept without surrendering anything: the incoming Democratic majorities get to write the full-year bills themselves rather than inheriting a lame-duck omnibus, and the outgoing Republican majorities avoid owning a second shutdown a year after the 43-day lapse of October and November 2025. The September stopgap itself is the precedent, passing the House 370 to 48 and the Senate 90 to 6. Prediction markets lean the same way, though not by much: Polymarket's "government shutdown by December 31" market priced a shutdown at about 42% on November 4, and Kalshi's December 12 shutdown market stood at about 34% in a mid-October snapshot.

That lean is not a comfortable one, and the reasons it could fail are specific. A short extension still needs a text both chambers can pass and the president can sign, and every expiring programme attached to it is a chance for a rider fight. Lawmakers who have just lost their seats have little reason to fear the political cost of a lapse, and the last time an opposition party won the House in a midterm, the lame duck produced a shutdown that lasted 35 days, from December 2018 into January 2019. The 43-day shutdown of 2025 cuts both ways in my reading: it is fresh enough to frighten negotiators, and recent enough to prove that a long lapse is survivable politics.

My judgment, then, is that Congress will enact a funding law before the deadline — full-year bills, another continuing resolution, or a hybrid — so that no funding lapse begins on December 12, and I put that at 60%. The tell will come in the first week of the lame-duck session: a clean, short extension text means the postponement is already agreed, while a text loaded with policy riders means December is being used as leverage after all. December 11 is not really a test of who won the election. It is a test of whether a defeated majority and an incoming majority can agree to have their real fight in January instead of December.