The move came days after the resignation of Daniel P. Driscoll, who had clashed with Defense Secretary Pete Hegseth over the purge of top generals in the Army.
Gen. Dan Caine, President Trump’s top military adviser. appeared to renounce the possibility that the military would interfere with the vote in an Aug. 28 letter to Senator Elissa Slotkin of Michigan.
The Postal Service disputed allegations by the whistle-blower that the agency had violated several court orders that should have halted work on the plan.