The move has rattled congressional Republicans, introducing an issue that Democrats feel they can use in the 2020 election to win back the Senate majority and even expand their House majority.

It handed them an issue that was seen as a primary factor in the GOP's loss of the House just last year, and was immediately used to fuel Democratic attacks that the Trump administration is determined to take away people's health care.

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Republicans in Congress tried and failed to repeal ObamaCare in 2017 and many in the party are wary of restarting the fight. But Trump believes health care can be a powerful issue for his party moving forward.

“I understand health care now, especially very well. A lot of people don't understand it, we are going to be, the Republicans, the party of great health care,” Trump said, repeating a pledge he made on Tuesday. “The Democrats have, they've let you down, they came up with Obamacare, it's terrible.”