WASHINGTON — Accused White House Correspondents’ Dinner shooter Cole Allen pleaded not guilty at a Monday hearing in DC federal court to charges including attempting to assassinate President Trump. Allen, 31, is also charged with assault on law enforcement, transporting a firearm across state lines to commit a felony and discharging a weapon during a crime of violence. He faces up to life in prison if convicted. Accused White House Correspondents’ Dinner shooter Cole Allen pleaded not guilty at a Monday hearing. A still image from surveillance video shows Allen running through a hotel security checkpoint and the shooting that unfolded with uniformed police officers and US Secret Service agents during the White House Correspondents’ Dinner in Washington, DC.…