ities ▁in ▁the ▁legisl ative ▁proceed ings ▁the ▁Senate ▁declared ▁the ▁seat ▁vac ant ▁January ▁ 5 , ▁ 1 8 5 7 . In c umb ent ▁was ▁subsequently ▁re - elect ed ▁January ▁ 2 9 , ▁ 1 8 5 7 , ▁to ▁fill ▁the ▁vac ancy . ▁| ▁ ▁now rap ▁| ▁James ▁Har lan ▁( R ) ▁| ▁January ▁ 2 9 , ▁ 1 8 5 7 ▁ ▁| } ▁ ▁House ▁of ▁Representatives ▁ ▁rep lac ements : ▁ 6 ▁ ▁Democr ats : ▁ 2 ▁seat ▁net ▁loss ▁ ▁O pp osition : ▁ 4 ▁seat ▁net ▁gain ▁death s : ▁ 4 ▁res ign ations : ▁ 5 ▁cont ested ▁election : ▁ 1 ▁Total ▁seats ▁with ▁changes : ▁ 1 0 ▁ ▁| - ▁| ▁ ▁| ▁V ac ant ▁| ▁style =" font - size : 8 0 %" ▁| ▁Rep - elect ▁L yman ▁Tr umb ull ▁res igned ▁in ▁previous ▁con gress ▁after ▁being ▁elected ▁to ▁the ▁US ▁Senate ▁| ▁ ▁| ▁James ▁L . ▁D . ▁Mor r ison ▁( D ) ▁| ▁Se ated ▁November ▁ 4 , ▁ 1 8 5 6 ▁| - ▁| ▁ ▁| ▁ ▁| ▁John ▁G . ▁Miller ▁( O ) ▁| ▁style =" font - size : 8 0 %" ▁| ▁D ied ▁May ▁ 1 1 , ▁ 1 8 5 6 ▁| ▁ ▁| ▁Thomas ▁P . ▁Ak ers ▁( A ) ▁| ▁Se ated ▁August ▁ 1 8