Agents stand guard after the shooting at the annual White House Correspondents Association Dinner on Saturday. Andrew Harnik/Getty Images hide caption toggle caption Andrew Harnik/Getty Images Hours after a gunman attempted to breach the White House Correspondents' Dinner, details are slowly emerging about who he is. The alleged gunman has been identified as Cole Allen, according to two sources familiar with the matter. The sources spoke on condition of anonymity because they were not authorized to speak publicly. He is believed to have been targeting administration officials, as acting Attorney General Todd Blanche told NBC's Meet the Press Sunday morning. The incident brought America's commonplace gun violence just feet away from a room full of lawmakers, top officials, and journalists. It also may add to a string of troubling political violence in the U.S. that includes two assassination attempts on President Trump.…