Democrats vs. insiders is the dominant story line in the race so far . After knocking off Eric Johnson , insurgents thought they had a sure win in Mississippi . `` I think the Republican establishment is fighting back more than in previous cycles . Two more Republican Senate incumbents are challengers but still lead in polls . The Republicans fear a tilt too far right may hurt party in November .
Democrats vs. insiders is the dominant story line in the race so far . After knocking off Eric Johnson , insurgents thought they had a sure win in Mississippi . Two more Republican Senate incumbents are challengers but still lead in polls . The Republicans fear a tilt too far right may hurt party in November .