A U.S. Department of Homeland Security vehicle parked outside the Immigration and Customs Enforcement field office in Scarborough on Jan. 15, 2026. (By Emma Davis/ Maine Morning Star)The Trump administration had given Maine a deadline of Friday to rescind its policy denying immigration authorities covert license plates. The state didn’t budge, leaving the threat of a lawsuit lingering. Maine Secretary of State Shenna Bellows had received a requ…