President Donald Trump's design for the Triumphal Arch he wants to build is up for review by a key federal agency and a possible vote to approve it. The 250-foot-tall arch would be built on federal land on the Virginia side of the Potomac River. It's one of several projects Trump is pursuing to leave a lasting footprint on Washington, including a new White House ballroom. The U.S. Commission of Fine Arts on Thursday is also set to review designs for an underground screening center for White House visitors and Trump's plan to paint the gray granite of a federal office building in white.