President Trump on Tuesday blasted ObamaCare and called for Republicans to fulfill their promise to repeal and replace his predecessor's signature healthcare legislation.

"Big day for HealthCare. After 7 years of talking, we will soon see whether or not Republicans are willing to step up to the plate!" Trump tweeted.

"ObamaCare is torturing the American People.The Democrats have fooled the people long enough. Repeal or Repeal & Replace! I have pen in hand."

Big day for HealthCare. After 7 years of talking, we will soon see whether or not Republicans are willing to step up to the plate! — Donald J. Trump (@realDonaldTrump) July 25, 2017

ObamaCare is torturing the American People.The Democrats have fooled the people long enough. Repeal or Repeal & Replace! I have pen in hand. — Donald J. Trump (@realDonaldTrump) July 25, 2017

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Republicans are expected on Tuesday to vote to take up the House-passed healthcare bill.

Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellGraham: GOP will confirm Trump's Supreme Court nominee before the election Trump puts Supreme Court fight at center of Ohio rally The Memo: Dems face balancing act on SCOTUS fight MORE (R-Ky.) will need 50 of the Senate's 52 Republicans to support the motion to proceed, and the vote is expected to be close.

On Monday, Trump urged Senate Republicans to "do the right thing" and vote this week to repeal and replace ObamaCare.

During a press conference at the White House, Trump said Republicans have so far not done their job in "ending the ObamaCare nightmare."

"They now have a chance, however, to hopefully, hopefully fix what has been so badly broken for such a long time," he said.