Betsy DeVos speaks during her confirmation hearing for Secretary of Education before the Senate Health, Education, Labor, and Pensions Committee on Capitol Hill January 17, 2017 in Washington, DC.
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(CNN) —  

Sen. Patty Murray, the top Democrat fighting Betsy DeVos’ nomination to become education secretary, said Tuesday she is reviewing written answers the Michigan billionaire provided to the Senate that may include plagiarized material.

DeVos was approved by a Senate committee vote – twice – despite Democratic efforts to derail her confirmation process. The vote came after The Washington Post reported that DeVos had appeared to plagiarize answers she submitted to the panel.

Murray, whose questions spurred the plagiarism allegations, said at the Senate hearing that it appears the Michigan Republican’s responses were “copied and pasted from previous statements, or are simple reiterations of the law and not true responses at all.”

“Additionally, we just received responses to hundreds of written questions yesterday — less than 24 hours before a scheduled vote — and with no time for full review and to ask any follow-up questions,” Murray said. “Though, I will say—upon initial review, many of the responses look copied and pasted from previous statements, or are simple reiterations of the law and not true responses at all.”

Trump education adviser Rob Goad described the plagiarism allegations as “character assassination.”

“To level an accusation against her about these words included in responses to nearly 1,400 questions – 139 alone from the ranking member – is simply a desperate attempt to discredit Betsy DeVos, who will serve the Department of Education and our nation’s children with distinction if confirmed,” said Goad, who sits on the White House Domestic Policy Council, in a statement.

The Senate Committee on Health, Education, Labor & Pensions voted two times 12-11, along party lines, to approve her nomination. The second vote came after Democrats called for a procedural move to require another and move it to next week. That delay effort failed.

Despite clearing a key procedural hurtle, DeVos’ eventual confirmation by the full Senate remained an open question as members of her own party told CNN wouldn’t commit to voting for her.

Sen. Lisa Murkowski said she had been inundated with calls from Alaskans raising concerns about DeVos, but said she would support her in the committee vote out of deference to the president.

“Do note, she has not yet earned my full support. … I would not advise yet that she count on my vote,” Murkowski said.

Sen. Al Franken, a Minnesota Democrat, noted Senate Democrats are focusing their efforts on grilling DeVos.

“I don’t think we should vote en masse against every nominee … This is one we should vote against,” Franken said.