Alabama Republican Sen. Tommy Tuberville refuses to release his hold on military nominations due to his opposition to the Pentagon's abortion policy — which covers some expenses for Department of Defense (DoD) personnel — leaving hundreds of key leadership positions unfilled.

"I warned the Pentagon that I would hold their most senior nominees if they broke the law," Tuberville said in a statement provided to Fox News Digital. 

"They did it anyway, and forced my hand. Since then, Chuck Schumer and the Biden administration have refused any serious negotiations, and so this situation has dragged on," the statement continued. 

Tuberville — a retired college football coach — said the hold, which began in February, has given him "more time to look more closely into the background of some these nominees," which has prompted "deep concerns." 

SENATE DEMOCRAT SAYS TUBERVILLE 'PREPARED TO BURN THE MILITARY DOWN' AMID BLOCKADE: REPORT

Sen. Tommy Tuberville, R-Ala.

Sen. Tommy Tuberville, R-Ala., arrives for a Senate Armed Services Committee confirmation hearing in Washington, D.C., on July 26, 2023. (Bill Clark/CQ-Roll Call, Inc via Getty Images)

"I will continue this process of oversight and I will announce my opposition to specific nominees in the weeks ahead," he said.

The statement was first obtained by Breitbart.

On Wednesday, Tuberville's office said in a statement regarding some of the nominees: "What we're finding isn't always pretty."

Tuberville's office pointed to an op-ed by Col. Ben Jonsson — one of President Biden's nominees — published in the Air Force Times in July 2020 in which Jonsson lists examples of what he terms "white defensiveness" in the wake of George Floyd's death. 

"Defensiveness is a predictable response by white people to any discussion of racial injustice. White colonels are no exception," Jonsson wrote.

His article concludes by urging readers to get the controversial book "White Fragility: Why It’s So Hard for White People to Talk About Racism," authored by critical race theory advocate Robin DiAngelo.

TUBERVILLE CRITICIZES VA FOR 'TROUBLING' NEEDLE EXCHANGE PROGRAM THAT HE SAYS PUTS VETS AT RISK, VIOLATES STATE LAW

Lloyd Austin, US secretary of defense

Secretary of Defense Lloyd Austin speaks during a news conference at the Queensland Government House in Brisbane, Australia, on July 29, 2023. (Ian Waldie/Bloomberg via Getty Images)

As of Aug. 12, 301 leadership positions in the DoD were vacant, and the number could double by the end of the year if the hold continues, according to data obtained by The Washington Post. 

Each of the DoD's five military branches is affected by the hold, including President Biden's nominee to be Joint Chiefs of Staff Chairman, Gen. Charles Q. Brown Jr.

Tuberville argues the Pentagon's abortion policy violates the Hyde Amendment from the 1970s, which restricts the use of federal funds to cover the cost of abortions, except in cases of rape, incest, or when the life of the mother is in danger.

In the aftermath of Roe v. Wade's reversal, the Pentagon's existing policy provides reimbursement for travel costs and grants leave for abortion procedures to military personnel.

ARMY, MARINE CORPS NOW WITHOUT SENATE-CONFIRMED LEADERS AS TUBERVILLE KEEPS UP PENTAGON PROTEST

F-16 aircraft

A group of F-16 aircraft are seen during a flyby over Nationals Park stadium in Washington, D.C., on March 30, 2023. (ANDREW CABALLERO-REYNOLDS/AFP via Getty Images)

"Coach’s position has not changed," Tuberville's office told Fox News Digital on Friday. "The hold will stay on as long as it takes."

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"It ends when the Biden administration stops their illegal use of taxpayer dollars to facilitate abortion. Coach would lift the hold immediately in such a scenario," it added.