President Donald Trump renewed his push for a new White House ballroom after a California man opened fire outside the White House Correspondents' dinner on Saturday, arguing that holding the event at his planned venue would have prevented the incident.  “This event would never have happened with the Militarily Top Secret Ballroom currently under construction at the White House. It cannot be built fast enough!” Trump said on Truth Social on Sunday.  Sen. Lindsay Graham backed the plan on Monday, joining two other senators in announcing legislation to ask Congress for $400 million to fund its construction, which has already begun and is expected to include security features. Trump previously promised the ballroom will be privately funded by wealthy donors.   “We saw Saturday that America has a problem,” Graham told reporters on Monday.…