A “firehouse primary” to select the Republican nominee to compete for the soon-vacant 10th U.S. congressional district will be held this Saturday, April 26, from 10 a.m. to 3 p.m. at 10 balloting stations throughout the district, which runs from sections of Prince William and Loudoun counties to McLean and the border of Falls Church.

With veteran Rep. Frank Wolf not seeking re-election after 30 years in Congress, the GOP will be challenged to hold the seat this year. State Del. Barbara Comstock of McLean and State Del. Bob Marshall of Prince William are the two major contenders while Howie Lind, Stephen Hollingshead, Marc Savott and Rob Wasinger are also on the ballot. The winner will face Fairfax County Board member John Foust of McLean, who is the only contender for the nomination, which he is expected to receive at a 10th District Democratic convention at Park View High School in Sterling this Saturday.