President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE ripped into ObamaCare on Twitter on Monday, calling the health insurance bill a “disaster” that will experience its “worst year yet" in 2017.

Trump's tweet also promised that Republicans will "come together and save the day" — a call for unity that comes as the House GOP's ObamaCare repeal-and-replace plan faces increasing pressure from others within the party.

ObamaCare is imploding. It is a disaster and 2017 will be the worst year yet, by far! Republicans will come together and save the day. — Donald J. Trump (@realDonaldTrump) March 13, 2017

Trump doubled down on his ObamaCare criticisms earlier this month, repeatedly saying it is “imploding."

We are making great progress with healthcare. ObamaCare is imploding and will only get worse. Republicans coming together to get job done! — Donald J. Trump (@realDonaldTrump) March 11, 2017

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The Congressional Budget Office (CBO) is expected to release a widely anticipated report on the GOP plan's costs and effect on the insurance market sometime this week. The CBO score is widely expected to be negative for the legislation.

Despite the push, many conservative lawmakers and affiliated groups have been largely critical of the ObamaCare repeal-and-replace proposal. Some suggest the plan is not yet ready to be voted on, while other Republicans say this plan does not do enough to fully repeal ObamaCare.