, ▁Lu zer ne , ▁Columbia , ▁Car bon , ▁North umber land , ▁D au ph in , ▁Perry ▁and ▁C umber land ▁count ies . ▁ ▁Democratic ▁primary ▁Form er ▁Haz leton ▁Mayor ▁Michael ▁Mars icano ▁ran ▁as ▁a ▁Dem ocrat . ▁ ▁Primary ▁results ▁ ▁Republican ▁primary ▁The ▁inc umb ent ▁was ▁Republican ▁Lou ▁Bar lett a , ▁who ▁had ▁represented ▁the ▁district ▁since ▁ 2 0 1 1 . ▁He ▁was ▁re - elect ed ▁with ▁ 6 6 % ▁of ▁the ▁vote ▁in ▁ 2 0 1 4 ▁and ▁the ▁district ▁had ▁a ▁P VI ▁of ▁R + 6 . ▁ ▁Bar lett a ▁ran ▁for ▁re - e lection . ▁ ▁Primary ▁results ▁ ▁General ▁election ▁ ▁Results ▁ ▁District ▁ 1 2 ▁ ▁The ▁ 1 2 th ▁district ▁was ▁in ▁South western ▁Pennsylvania ▁and ▁included ▁all ▁of ▁Be aver ▁County ▁and ▁parts ▁of ▁Al leg hen y , ▁Camb ria , ▁Lawrence , ▁Som erset ▁and ▁West mor eland ▁count ies . ▁ ▁Democratic ▁primary ▁ 2 0 1 4 ▁Democratic ▁nom ine e ▁Er in ▁McC le ll and ▁announced ▁that ▁she ▁would ▁run ▁again ▁in ▁ 2 0 1 6 . ▁ ▁Att orney ▁and ▁renew able ▁energy ▁business ▁owner ▁Steve ▁L arch uk , ▁who ▁ran ▁in ▁ 2 0 0 4 ▁in ▁the ▁ 4 th ▁district ▁on ▁a ▁health care ▁platform ▁in ▁support ▁of ▁Universal ▁Health care ▁for ▁the ▁United ▁States , ▁also ▁ran ▁for ▁the ▁Democratic ▁nom ination .