Sen. Susan CollinsSusan Margaret CollinsThe Hill's Morning Report — Presented by the Coalition for Affordable Prescription Drugs — Health care a top policy message in fall campaigns Susan Collins and the mob mentality Graham: I hope Dems 'get their ass kicked' for conduct around Kavanaugh MORE (R-Maine) said Thursday that she may change her vote on the final version of the GOP tax-reform bill if her proposed amendments are not included in its final version. 

"I would. I'm going to look at what comes out of the conference committee meeting to reconcile the differences between the Senate and House Bill. So I won't make a final decision until I see what that package is," Collins told CBS WABI 5 when asked if she would consider changing her vote.

The House and Senate are currently in conference working out the differences between their two bills, and could include unique provisions from both in the final version. 

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Collins added two amendments to the legislation that passed the Senate last week, one of which would allow taxpayers to deduct property taxes from their annual federal filings, restoring a provision of the House bill that the Senate took out. 

Another provision added by Collins would lower the threshold for tax deductions for medical expenses. 

The moderate Republican senator voted affirmatively on the Senate bill, giving Republicans the votes needed to pass it. Collins, a stickler on reductions to government health care, previously defected from the party to sink Republicans' efforts to repeal the Affordable Care Act over the summer. 

"There's a real fear that the tax bill is going to trigger a 4 percent cut in Medicare," Collins added. "I am absolutely certain that 4 percent cut in Medicare that I mentioned will not occur. I have it in writing from both the Speaker of the House Paul RyanPaul Davis RyanThe Memo: Saudi storm darkens for Trump The Hill's 12:30 Report — Mnuchin won't attend Saudi conference | Pompeo advises giving Saudis 'few more days' to investigate | Trump threatens military action over caravan The Hill's Morning Report — Presented by the Coalition for Affordable Prescription Drugs — Health care a top policy message in fall campaigns MORE [R-Wis.] and also Sen. Mitch McConnellAddison (Mitch) Mitchell McConnellOvernight Health Care — Presented by Purdue Pharma — Trump says GOP will support pre-existing condition protections | McConnell defends ObamaCare lawsuit | Dems raise new questions for HHS on child separations Poll finds Dems prioritize health care, GOP picks lower taxes when it's time to vote The Hill's 12:30 Report — Mnuchin won't attend Saudi conference | Pompeo advises giving Saudis 'few more days' to investigate | Trump threatens military action over caravan MORE [R-Ky.]."

Collin expressed optimism that the final bill will adopt her amendments.