 But it's whether or not the President Biden supporters are galvanized to go out as well. But we'll have to see. Nomia Iqbal. In some ways, the man suspected of shooting at Donald Trump sounds like so many other young American gunmen. He was apparently something of a loner, bullied at school, and known for wearing military clothing. 21-year-old Thomas Matthew Crooks was using a legally purchased semi-automatic rifle, and he had gun club membership.