 The campaign called the trip off, according to a source familiar with the planning. On Sunday, both President Biden and Harris received a briefing by Homeland Security and law enforcement officials on the shooting. Deepa Shivaram, NPR News, the White House. The FBI has identified the suspect in the shooting as Thomas Matthew Crooks. State records show he was a registered Republican and had also donated $15 in 2021 to ActBlue, a Democratic-allied organization.