A leak caused a minor flood in the Capitol Visitor Center on Thursday afternoon, creating a pool of water in one of the months-old underground building’s hallways. Officials from the Architect of the Capitol’s office said they have not yet determined the cause, but workers seemed to have stopped the flooding. By 5:30 p.m., they were cleaning up the water, which had collected in the eastern corridor on the Senate side of the building. Capitol Police Chief Phillip Morse, who was on scene, said officers discovered the leak while patrolling the building and reported it to the AOC. The CVC just opened Dec. 2 and cost $621 million to build. At more than 500,000 square feet, it is the largest-ever expansion of the Capitol.