The Federal Bureau of Investigation is treating the shooting at a rally of former President Donald Trump as a potential act of domestic terrorism and an assassination attempt. What Happened: The FBI is investigating the shooting at Trump’s campaign rally in Butler, Pennsylvania, on Saturday as an assassination attempt and a potential domestic terrorism act, reported The Hill on Sunday. The suspected shooter, identified as 20-year-old Thomas Matthews Crooks, died during the incident. The FBI is currently looking into his motive. “At this point [in] the investigation, it appears that he was a lo…