Republicans in Congress have launched new efforts to approve and pay for President Donald Trump’s proposed ballroom at the White House. They argue it would help avert security breaches like the shooting at Saturday’s White House Correspondents’ Association dinner. A bill introduced by Republican senators would authorize $400 million  for construction and security infrastructure underneath. Trump has said that private money would pay for the ballroom. Graham said at a news conference that it is necessary to allow the president to hold events safely and avoid much less secure venues like the Washington Hilton, where Saturday’s event was held.