The shooter, Omar Mateen, had been on a watch list for 10 months before being removed. It's unclear whether all sides can find common ground on the watch list issue in the coming days. On Tuesday, it tweeted that bans for people on watch lists are "ineffective, unconstitutional, or both." I will be meeting with the NRA, who has endorsed me, about not allowing people on the terrorist watch list, or the no fly list, to buy guns. He said those on a watch list who try to buy a gun "should be thoroughly investigated by the FBI and the sale delayed while the investigation is ongoing."

Source: Fox News June 15, 2016 18:20 UTC