Trump assassination attempt: Shooter’s motives remain unknown; Biden urges calm; Republicans convene in Milwaukee

The investigation continued Monday into the Donald Trump assassination attempt in Pennsylvania with still no greater understanding as to why the 20-year-old shooter opened fire on the former president during his campaign rally Saturday.

The FBI searched the home of Thomas Matthew Crooks, who lived in Bethel Park, PA, and are examining his cellphone for leads as to a possible motive. Federal agents said Sunday they were investigating the incident as a possible act of domestic terror, but believe Crooks acted alone.