By Bob Brigham The candidate quality issue that has frustrated GOP Leader Mitch McConnell in U.S. Senate races is also impacting the GOP in congressional races as the party heads into November with far-right extremists. “As the midterm election season enters a critical final phase, some far-right Republicans are facing headwinds in congressional races that once appeared to be prime opportunities for the party to win seats, complicating the plans of Representative Kevin McCarthy, the minority leader who aspires to be speaker, and fueling Democratic hopes of cutting their losses in their fight t…