▁seat ▁net ▁gain ▁ ▁Wh igs ▁( W ): ▁ 1 ▁seat ▁net ▁loss ▁ ▁death s : ▁ 5 ▁ ▁res ign ations : ▁ 6 ▁ ▁cont ested ▁election : ▁ 1 ▁ ▁seats ▁of ▁newly ▁admitted ▁states : ▁ 4 ▁ ▁Total ▁seats ▁with ▁changes : ▁ 1 7 ▁ ▁| - ▁| ▁ ▁| ▁V ac ant ▁| ▁style =" font - size : 8 0 %" ▁| ▁Florida ▁admitted ▁to ▁the ▁Union ▁at ▁end ▁of ▁previous ▁con gress ▁| ▁ ▁| ▁Edward ▁C . ▁Cab ell ▁( W ) ▁| ▁Se ated ▁October ▁ 6 , ▁ 1 8 4 5 ▁| - ▁| ▁ ▁| ▁V ac ant ▁| ▁style =" font - size : 8 0 %" ▁| ▁Rep - elect ▁Washington ▁Po e ▁decl ined ▁the ▁seat ▁| ▁ ▁| ▁George ▁W . ▁Town s ▁( D ) ▁| ▁Se ated ▁January ▁ 5 , ▁ 1 8 4 6 ▁| - ▁| ▁ ▁| ▁col span = 2 ▁style =" font - size : 8 0 %" ▁| ▁Texas ▁admitted ▁into ▁the ▁Union ▁December ▁ 2 9 , ▁ 1 8 4 5 , ▁and ▁seat ▁remained ▁vac ant ▁until ▁March ▁ 3 0 , ▁ 1 8 4 6 ▁| ▁ ▁| ▁David ▁S . ▁Kauf man ▁( D ) ▁| ▁Se ated ▁March ▁ 3 0 , ▁ 1 8 4 6 ▁| - ▁| ▁ ▁| ▁col span = 2 ▁style =" font - size : 8 0 %" ▁| ▁Texas