The U.S. Department of Justice has demanded that the city of Denver, Colorado, repeal its longstanding ban on assault-style weapons. Mayor Mike Johnston has labelled this as federal overreach and escalates a broader dispute with the Trump administration over local control of gun laws. The law prohibits the possession and sale of guns with magazines holding 15 or more. The city government argues that it has a legal authority to regulate firearms within its city limits and is consistent with state law and the U.