Washington (CNN) President Donald Trump declared Tuesday that the GOP will become the party of health care, without providing any specifics for what that means and coming a day after the Trump administration told a federal court that the entire Affordable Care Act should be struck down -- a dramatic reversal of its previous position.

"The Republican Party will soon be known as the party of health care. You watch," Trump said ahead of a lunch meeting with Republican lawmakers on Capitol Hill.

The comment follows a Monday filing with a federal appeals court, in which the Justice Department said it agreed with the ruling of a federal judge in Texas who invalidated the Obama-era health care law.

In a letter Monday night, the administration said "it is not urging that any portion of the district court's judgment be reversed."

It's a major shift for the Justice Department from when Jeff Sessions was attorney general. At the time, the administration argued that the community rating rule and the guaranteed issue requirement -- protections for people with preexisting conditions -- could not be defended but the rest of the law could stand.

Read More