Iowa Democrat Rita Hart announced today she is withdrawing her challenge to U.S. Rep. Mariannette Miller-Meeks' election in Iowa's 2nd Congressional District, according to the Des Moines Register. Hart had asked the U.S. House to review the outcome, which was decided by a razor-thin margin of six votes. A district-wide recount showed Miller-Meeks won the race by just six votes out of nearly 400,000 cast, the tightest margin of any U.S. election since 1974. A bipartisan state panel certified the