 On Saturday, those sources said, we're also learning that the gun used in the attempted assassination belonged to the shooter's dad. The Wall Street Journal is reporting that as well. We'll bring you more updates as we get them. President Biden, meanwhile, is calling that assassination attempt on Trump unprecedented in a press conference shortly after the shooting. However, the U.S. has a long history of political violence. The last time a president was shot was Ronald Reagan in 1981.