The Brief A top Trump Justice Department official argued in court against Illinois' assault weapons ban. The Illinois law that bans assault weapons is facing big opposition from the Trump administration. What we know:Harmeet Dhillon, the head of the DOJ’s Civil Rights Division, came to Chicago on Monday to testify in a federal court hearing against the Illinois assault weapons ban law. The judge said this case was one of multiple court challenges to the assault weapons ban, worrying that different jurisdictions might come to different rulings on the issue. Dhillon said that the other cases would not impact her view that the Illinois ban is unconstitutional.