WASHINGTON — As lawmakers loudly sparred in recent weeks about how to reimburse the National Guard half a billion dollars for protecting the Capitol this year, the Pentagon quietly offered to simply foot the bill by deferring “non-urgent” facilities repairs by a few months, CQ Roll Call has learned.

The Defense Department’s seemingly simple solution has barely been mentioned in the current debate. Some lawmakers do not want the military to have to foot the National Guard’s bill by redirecting money in its budgets, even if the Pentagon has suggested it can do so without adverse effect.

In a June 11 reprogramming request that has not been previously reported, the Defense Department said it could cover $521 million in Army National Guard and Air National Guard costs by merely putting off until later this year certain “lower-priority” and “non-urgent” repair projects in Army, Navy and Air Force facilities.

Debate over how to compensate the Guard for its unprecedented Capitol deployments has bedeviled Congress and triggered partisan spats — chiefly about what else besides new Guard money to put in a supplemental spending bill, not whether the Guard needs the additional half a billion dollars.

Gen. Daniel R. Hokanson, the chief of the National Guard Bureau, said last month that if the Guard is not reimbursed “in a timely manner,” then it would have “a very significant impact on National Guard readiness.” Lawmakers in both parties have echoed that plea in making the case for new appropriations.

At least three bills are pending, including one totaling $3.7 billion, that would fund the Guard and the Capitol Police and in some cases pay for other programs unrelated to security on the Hill. A fourth bill would appropriate just the $521 million.

Rep. Steve Womack, R-Ark., a retired Army National Guard colonel who serves on the Defense Appropriations Subcommittee, noted the reprogramming request during a July 13 markup of the $705.9 billion Defense spending bill. Womack urged his colleagues to reject it and to provide new funds instead.

“That’s the epitome of robbing Peter to pay Paul,” Womack said of reprogramming the money.

Womack and Ken Calvert, R-Calif., on Friday filed a measure that would appropriate $521 million in new funds to repay the Guard.

“It is essential that Congress act in a quick and bipartisan fashion to ensure the Guard has the resources it needs to fulfill its critical mission,” Calvert, the ranking member of the Defense Appropriations Subcommittee, said in a statement Friday. “Our legislation avoids any partisan or unrelated issues and simply provides the funding the Guard needs so that training will not be impacted.”

In the same statement, Womack said that without additional funds, the Guard’s readiness would go down 15% to 20% in the next couple of months, with training and armory upgrades among the programs affected.

“We owe our guardsmen and women across the nation a debt of gratitude for their selfless actions, especially over the last year,” Womack said at the July 13 markup.

Reprogramming the funds would not be easy or free, Alexia Sikora, a spokeswoman for Womack, said in an email on Friday.

Doing so, she said, “takes modernization dollars out of nuclear submarine refit facilities, barracks upgrade projects, investments in cyber training centers and cadet barracks at the U.S. Military Academy. These are projects identified as needed projects by the services.