President Donald Trump on Sunday escalated his call for the Washington Commanders to change their name back to the “Redskins,” threatening to restrict the NFL team’s stadium deal if they don’t, though it’s unclear how he would be able to.

U.S. President Donald Trump threatened on Sunday to interfere with a deal to build a new football stadium in Washington, D.C., unless the local NFL team, now known as the Commanders, changes its name back to Redskins.

After rebranding the Gulf of Mexico to the Gulf of America earlier this year, Trump is now calling for the Washington Commanders and the Cleveland Guardians to revert their names to the Washington Redskins and Cleveland Indians, respectively.