Shots rang out at the White House Correspondents' Association dinner Saturday night, sending Secret Service agents to evacuate President Trump from the Washington Hilton ballroom — and adding to a list of close calls no modern president has faced. The big picture: Saturday's threat is the latest in a documented pattern dating back to Trump's first presidential campaign. The record spans lone gunmen at his rallies, Iranian state-backed murder-for-hire plots and repeated security breaches . The latest: Scant details have emerged about Saturday night's shooting, including whether the president was the intended target. Shots were fired around 8:30pm ET at the Washington Hilton, where the dinner was being held. Trump was scheduled to speak at the event, and Vice President Vance, several members of Trump's Cabinet and Congressional lawmakers were also in attendance.…