President Donald Trump blasted Sen. Lisa Murkowski on Twitter Wednesday because she was one of the two Republicans senators who voted against a motion to proceed on the Republican’s health care bill. She was joined by Maine Republican Sen. Susan Collins.

Murkowski, who represents Alaska, has been visible in criticism of versions of the Republican health care bill because they make deep cuts to Medicaid and defund Planned Parenthood. She has also been critical of the secretive process to write the different variations of the bills ushered in by Majority Senate Leader Mitch McConnell of Kentucky.

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“I have repeatedly said that health care reform, and especially major entitlement reform, should go through the committee process where stakeholders can weigh in and can be vetted in a bipartisan forum,” said Murkowski in a statement Tuesday. “I voted ‘no’ today to give Senate another chance to take this to committee process … we all recognize that we have much work to do address the health care concerns in this country.”

Trump has been cajoling members of Congress to pass a bill to repeal, replace or both the Affordable Care Act, also known as Obamacare. Repealing the Affordable Care Act has been a goal of Republicans for years, and a promise of Trump on the campaign trail. The idea of Murkowski getting in the way led Trump to call her out.

“Senator @lisamurkowski of the Great State of Alaska really let the Republicans, and our country, down yesterday. Too bad!” said Trump Wednesday morning on Twitter.

The motion to proceed vote ended in a tie Tuesday. Vice President Mike Pence cast the tie breaking vote for debate to start on the Republican versions of a health care bill. The bill is being considered in the budget reconciliation process which means it can be passed by a simple majority as opposed to the usual 60-vote majority.

Murkowski, 60, has been in the Senate since 2002. She was appointed to the seat by her father, Frank Murkowski, who retired from the seat to become Alaska’s governor.

She won her first full term for the seat in a 2004 election. She lost the Republican nomination in her 2010 bid for the seat but eventually won it on a write-in campaign. She is only the second senator to win a seat by write-in, the first was Strom Thurmond in 1954.

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Different Republican groups consider Murkowski to be more moderate, as she is pro-choice and began supporting same-sex marriage later in her Senate career. Murkowski is also the Chair of the Senate Energy Committee.

Originally from Ketchikan, Alaska, the senator worked as a lawyer and was a member of the Alaska House of Representatives before beginning her Senate career. She is married and has two children.