7 , ▁ 1 8 4 6 ▁| - ▁| ▁ ▁| ▁ ▁| ▁August us ▁C . ▁D odge ▁( D ) ▁| ▁col span = 3 ▁style =" font - size : 8 0 %" ▁| ▁Territ ory ▁was ▁dissol ved ▁after ▁Iowa ▁was ▁admitted ▁to ▁the ▁Union ▁December ▁ 2 8 , ▁ 1 8 4 6 ▁| - ▁| ▁ ▁| ▁col span = 2 ▁style =" font - size : 8 0 %" ▁| ▁Iowa ▁admitted ▁into ▁the ▁Union ▁December ▁ 2 8 , ▁ 1 8 4 6 ▁| ▁ ▁| ▁S . ▁Cl inton ▁H ast ings ▁( D ) ▁| ▁Se ated ▁December ▁ 2 8 , ▁ 1 8 4 6 ▁| - ▁| ▁ ▁| ▁col span = 2 ▁style =" font - size : 8 0 %" ▁| ▁Iowa ▁admitted ▁into ▁the ▁Union ▁December ▁ 2 8 , ▁ 1 8 4 6 ▁| ▁ ▁| ▁She ph erd ▁Le ff ler ▁( D ) ▁| ▁Se ated ▁December ▁ 2 8 , ▁ 1 8 4 6 ▁| - ▁| ▁ ▁| ▁ ▁| ▁Edward ▁D . ▁Baker ▁( W ) ▁| ▁style =" font - size : 8 0 %" ▁| ▁Res igned ▁January ▁ 1 5 , ▁ 1 8 4 7 , ▁in ▁order ▁to ▁take ▁part ▁in ▁the ▁Mexican ▁War ▁| ▁ ▁| ▁John ▁Henry ▁( W ) ▁| ▁Se ated ▁February ▁ 5 , ▁ 1 8 4 7 ▁| - ▁| ▁ ▁| ▁ ▁|