Fulton County District Attorney Fani Willis and special prosecutor Nathan Wade have been subpoenaed to testify at a hearing to determine whether they can proceed with the prosecution of Donald Trump and 14 co-defendants. While representing co-defendant Mike Roman, Ashleigh Merchant’s law firm brought a lawsuit claiming Willis’ office had deliberately violated the Open Records Act by refusing to turn over documents related to a Feb. 15 hearing. The district attorney’s office said that it complied with state law. Fulton County Superior Court Judge Scott McAfee set the Feb. 15 hearing after Merch…