Nevada Democratic Sen. Catherine Cortez Masto is filing a long-shot effort to delay a vote on the Republican-backed tax overhaul bill for at least three days.

The freshman Democrat plans to file the so-called “Motion to Commit” sometime on Thursday afternoon, as Senate Republicans inch closer to approving the first major change to the federal tax code in three decades.

Democrats have filed several unsuccessful motions to kick the tax bill back to the Senate Finance committee, after Republicans voted along party-lines on Wednesday to open debate on the measure. At least four other similar motions filed Thursday by Senate Democrats failed to advance on party-line votes.

Cortez Masto’s motion would specifically instruct the finance committee to strike portions in the bills that would reduce health-care access or limit coverage or benefits in the private insurance market for people over the age of 50. It would also instruct the committee to strike any provisions that increase taxes on people over 50 between the bill’s enactment and 2037.

“Middle-class families in my state can’t afford a tax increase and they can’t afford to pay more for health insurance,” she said in a statement. “This Motion to Commit would prevent tax hikes on Americans ages 50 and older, and would protect their access to quality affordable health care.”

A newly released report from the Joint Committee on Taxation released Thursday projected that the bill would add roughly $1 trillion to the federal deficit over a ten-year period, while raising the nation’s Gross Domestic Product by 0.8 percent by 2027.

Cortez Masto motion to commit GOP Tax bill by Riley Snyder on Scribd