NEW You can now listen to Fox News articles! The man accused of attempting to kill President Donald Trump on April 25 at the White House Correspondents' Association Dinner entered a plea in a Washington, D.C., federal court Monday morning to four charges related to the alleged crime. Cole Allen, 31, of Torrance, California, pleaded not guilty to attempting to assassinate the president of the United States, discharge of a firearm during a crime of violence, transporting a firearm across state lines and assaulting a federal officer with a deadly weapon. President Donald Trump posted a photo on social media showing law enforcement detaining Cole Thomas Allen following a shooting incident at the White House Correspondents' Association Dinner in Washington, D.C., on April 25, 2026. (US President Trump via Truth Social/Anadolu/Getty Images) More charges are possible, according to U.S. Attorney for the District of Columbia Jeanine Pirro.…