Democrats won an exurban St. Louis seat in the Missouri state House of Representatives on Tuesday, racking up another victory in a district carried easily by President Trump in the 2016 election. Voters in Jefferson County appeared to choose Mike Revis, a 27-year old Democrat, to fill a seat left vacant when the incumbent quit to run for county executive. With all ten precincts within the district reporting, Revis led Republican David Linton by 108 votes, or about three percentage points.