▁represent atives ▁not ▁associated ▁with ▁the ▁Democratic ▁Party ▁or ▁the ▁American ▁Party ▁are ▁l abeled ▁as ▁" O pp osition ." ▁This ▁is ▁the ▁first ▁example ▁in ▁U . S . ▁history ▁of ▁a ▁form ▁of ▁coal ition ▁government ▁in ▁either ▁house ▁of ▁Congress . ▁ ▁Senate ▁ ▁House ▁of ▁Representatives ▁The ▁parties ▁that ▁opposed ▁the ▁Democr ats ▁joined ▁a ▁coal ition ▁and ▁formed ▁the ▁majority . ▁The ▁Know ▁N oth ings ▁c auc used ▁with ▁the ▁O pp osition ▁coal ition . ▁ ▁Le ad ership ▁ ▁Senate ▁▁ ▁President : ▁V ac ant ▁ ▁President ▁pro ▁temp ore : ▁J esse ▁D . ▁Bright ▁( D ), ▁until ▁June ▁ 9 , ▁ 1 8 5 6 ▁ ▁Charles ▁E . ▁Stuart ▁( D , ▁June ▁ 9 , ▁ 1 8 5 6 ▁– ▁June ▁ 1 0 , ▁ 1 8 5 6 ▁ ▁J esse ▁D . ▁Bright ▁( D ), ▁June ▁ 1 1 , ▁ 1 8 5 6 ▁– ▁January ▁ 6 , ▁ 1 8 5 7 ▁ ▁James ▁M . ▁Mason ▁( D ), ▁from ▁January ▁ 6 , ▁ 1 8 5 7 ▁ ▁House ▁of ▁Representatives ▁▁ ▁Spe aker : ▁Nathan iel ▁P . ▁B anks ▁( A ) ▁ ▁Democratic ▁C au cus ▁Chair man : ▁George ▁Washington ▁Jones ▁ ▁M embers ▁This ▁list ▁is ▁arranged ▁by ▁chamber , ▁then ▁by ▁state . ▁Sen ators ▁are ▁listed ▁in ▁order ▁of ▁senior ity , ▁and ▁Representatives ▁are ▁listed ▁by ▁district .