President-elect Trump’s selection of Rep. Tom Price to lead the Department of Health and Human Services could put aspects of President Obama’s signature legislative achievement, the Affordable Care Act, at risk, the White House acknowledged Tuesday.

“What is clear is that the president-elect has chosen to nominate someone to be his secretary of health and human services who is an ardent opponent of the Affordable Care Act and somebody who says he is committed to repealing it,” spokesman Josh Earnest told reporters.