The day after the presidential election marked the strongest enrollment day this year for President Barack Obama's health care law.

According to the Department of Health and Human Services, more than 100,000 people selected health care plans Wednesday on Healthcare.gov, the site where most Americans who don't get insurance from an employer can sign up for tax-subsidized coverage.

"Best day yet this Open Enrollment," Sec. Sylvia Burwell of the Department of Health and Human Services tweeted Thursday.

The Obama administration has been working to enroll more than 1 million more people than it did last year in these plans, projecting that it will end up with 13.8 million signups by the end of open enrollment Jan. 31.

But the provision will face scrutiny under the next administration. During his campaign, President-elect Donald Trump called Obamacare a "disaster," pointing to rate hikes for premiums in the plans and calling for the law's full repeal. Consumers also have complained about limited coverage options and about out-of-pocket costs they have faced in the form of deductibles or co-pays.

The Obama administration has pushed back against news about rate hikes by noting that the majority of those who qualify for health plans, however, will see tax subsidies go up to help alleviate costs. They point to figures that show more than 7 in 10 enrollees will be able to find plans whose premiums total $75 a month.

“We are all in for this Open Enrollment, and we continue to execute a robust outreach strategy with partners across the nation to let Americans know affordable coverage is available," Marjorie Connolly, press secretary for the Department of Health and Human Services, said in a statement.