With no radical footprint, what drove suspect to try and assassinate Trump?

Law enforcement surrounds the Washington Hilton Hotel where shots were fired near the White House Correspondents' Association Dinner featuring President Donald Trump in Washington, D.C., on April 25. Andrew Leyden/Getty Images hide caption toggle caption Andrew Leyden/Getty Images Monday's arraignment of 31-year old Cole Tomas Allen, a California man who is charged with attempting to assassinate President Trump over the weekend, opened legal proceedings that many extremism experts will be …