Chicago mayor to Trump: It's 'not happening'

Hours after Lightfoot pleaded for an end to Chicago's "carnage" of gang violence, U.S. President Donald Trump announced that officers from the FBI and other federal agencies would reinforce the prosecution of criminals in the city.

Trump's announcement followed an alarming night of violence in Chicago which included a gun battle between gang members at a funeral that wounded 15 people including a 3-year-old girl, who was shot in the head but is expected to survive.

Trump has sought to promote a law-and-order message ahead of the Nov. 3 presidential election, targeting cities controlled by Democrats.