Pennsylvania state Sen. Doug Mastriano, the Republican gubernatorial nominee, is scheduled to meet on Aug. 9 with the House’s Jan. 6 committee. While it was to be a voluntary interview, the committee is now demanding a compelled deposition.

Republican gubernatorial candidate Doug Mastriano, following his win in the Pennsylvania Republican primary, gives a victory speech at his election night party at The Orchards in Chambersburg, Pa., on May 17, 2022. Michael M. Santiago/Getty Images