Also, FWIW, any eleventh-hour changes to the subsidy situation would probably also require actual changes to the law regarding the enrollment period, in order to help people get coverage for 2026.
“Main OEP” ends at midnight Monday (December 15th) – in order to have coverage on January 1st, you must sign up for coverage by that date. if you don’t buy coverage by then, you won’t be covered on January 1st. That’s in the law.
However, there is a “Late OEP”* period, which extends from December 16th until January 15th. During that period, you can still buy coverage, but it won’t be effective until February 1st. That, too, is in the law.
Open Enrollment ends on January 15th. Full stop, that’s the law right now. If you don’t buy insurance by then, you are out of luck until next year’s Open Enrollment, unless you experience a “qualifying life event” (e.g., getting married, having a baby, changing jobs, moving), which opens up a short “Special Enrollment Period” for you, to buy or change insurance.
If Trump tries something next week, it won’t be able to affect people who haven’t signed up yet, as far as being covered in January, because the deadline for Jan 1 coverage, as defined in the law, will have passed. And, unless the subsidies get re-instituted by early January, it won’t enable people who are currently opting out of buying insurance, at all, for 2026 – again, unless the law actually gets changed to address this.
*- “Late OEP,” as I understand it, has always been optional, but the government has annually included it in Open Enrollment. However, my understanding is that the Trump Administration has already decided to shorten the late OEP for next year.