WASHINGTON, DC – OCTOBER 27: Senate Armed Services Committee Chairman John McCain (R-AZ) (R) and Sen. James Inhofe (R-OK) hold a hearing about U.S. military strategy in the Middle East in the Dirksen Senate Office Building on Capitol Hill October 27, 2015 in Washington, DC. The committee heard testimony from Defense Secretary Ashton Carter and Joint Chiefs of Staff Chairman Gen. Joseph Dunford Jr. about changes in the strategy that will continue to support Iraqi forces and pro-Western forces in Syria in the fight against ISIS and the Assad regime. (Photo by Chip Somodevilla/Getty Images) ∧

Arizona Sen. John McCain is set to oppose President Donald Trump’s appointee to head the Office of Budget Management, according to a Wednesday report from The Hill.

Rep. Mick Mulvaney was appointed to head up the OMB last month, and McCain announced he will be one of the Republican senators who plan to vote against the pick.

“My decision to oppose this nomination is not about one person. It is not about one Cabinet position,” McCain asserted. “This is not political. This is about principle.”

“[He] has spent his last six years pitting the national debt against our military,” McCain said of Mulvaney.

McCain reportedly feared that Mulvaney’s installation would not be in the best interests of the military, which could ultimately hurt the country as a whole.

“Voting in favor of Congressman Mulvaney’s nomination would be asking Secretary Mattis to spend less time fighting our enemies overseas and more time fighting inside-the-beltway budget battles with an OMB director,” he said.

Mulvaney never voted for a budget or debt limit increase, according to Sen. Susan Collins, and pro-military congressmen worry that an anti-spending attitude will threaten the status of the military, despite Trump’s repeated claims that he will increase the size and scope of the military.

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