The move, which the former president approved a week before leaving office last month, surprised Colorado officials and raised questions of political retaliation, the Associated Press reports.
Mr. Trump suggested at a 2020 rally in Colorado Springs that the U.S. Space Command would be at Peterson Air Force Base in the city.
But after Republican Senator Cory Gardner of Colorado lost his seat, Trump decided to move command headquarters to the U.S. Army’s Redstone Arsenal in Huntsville, Alabama.
Trump won 62 percent of the votes in Alabam in the 2020 presidential election, and the state also elected a pro-Trump senator, Tommy Tuberville.
Now, the Defense Department’s inspector general has announced an investigation into the relocation to see if it complied with Air Force and Pentagon policy.
“It is imperative that we thoroughly review what I believe is a fundamentally flawed process, which focuses on grain counting rather than American space domination,” said Republican Congressman Doug Lamborn, whose district includes Space Command.
Colorado’s two Democratic senators also welcomed the review.
“Moving Space Command will disrupt the mission while risking our national security and economic vitality,” said Michael Bennet and John Hickenlooper in a joint statement.
The U.S. Space Command differs from the U.S. Space Force, the sixth and newest branch of the U.S. Armed Forces that was established in 2019.
Space Command is not an individual military service, but a central command for all military space operations.
It was dissolved in 2002 and also revived in 2019.
The Air Force accepted offers from six final locations, including Huntsville, before Trump hinted he would stay in Colorado.
The Associated Press contributed to this report