The shutdown-ending bill passed Nov. 12 didn't include provisions to extend ACA healthcare subsidies - a major sticking point for Democrats. Enhanced premium tax credits expire Dec. 31, threatening to increase costs for millions.

One couple's premiums will jump from $400 to $1,975 for the same policy. Nearly all of the marketplace's post-2020 enrollment surge came from states Trump carried, meaning the subsidy cliff will hit Trump country first. Congress punted the fight until after the Dec. 31 deadline.