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.) said on Wednesday that Sen. John McCain John Sidney McCainBiden's six best bets in 2016 Trump states Replacing Justice Ginsburg could depend on Arizona's next senator The Hill's Morning Report - Sponsored by Facebook - Washington on edge amid SCOTUS vacancy MORE (R-Ariz.) would put his personal feelings about President Trump aside when voting on tax reform.

"He voted to get on the bill. And I know John McCain well enough to know he’s not going to cast a vote on tax reform over how he may feel about the current occupant of the White House," McConnell told Laura Ingraham on Fox News's "Ingraham Angle."

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McConnell's comments come after the Senate voted Wednesday to begin debates on tax-reform legislation on a party-line vote of 52-48.

Senate Republican leaders are aiming to secure 50 votes to pass tax reform before Christmas.

However, some Republican senators, including McCain, are still unsure whether they will vote for the bill.

Sen. Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (R-Tenn.) had criticized the legislation for what it would add to the deficit; McCain has voiced his opposition in the past to tax cuts that would add to the deficit.

McCain also proved to be a thorn in the side of his colleagues and the Trump administration during the health-care debate, voting against the ObamaCare repeal bill earlier this year.

Trump and McCain have traded personal barbs since the beginning of the 2016 presidential campaign when Trump said he did not consider McCain a war hero because he was captured in Vietnam.