By David Badash Christian nationalist Doug Mastriano, the Republican Party’s gubernatorial nominee for Pennsylvania who was at the US Capitol on January 6 and is seen as a central figure in the plot to overturn the election, complied with a subpoena to appear before the U.S. House Select Committee on the January 6 Attack but didn’t answer any questions. “Trump ally Doug Mastriano’s virtual appearance Tuesday before the House January 6 committee only lasted about 15 minutes,” CNN reports, adding that “‘he didn’t answer a single question,’ according to a source familiar with the matter.” New Yor…