National Conference of State Legislatures Republican-controlled legislature for the last eight years state legislative level a majority of state legislatures National Conference of State Legislatures 32 statehouses 2017 partisan composition according to the National Conference of State Legislatures. predominantly Republican state legislatures predominantly Republican state legislatures National Conference of State Legislatures state legislatures "State Partisan Composition" National Conference of State Legislatures National Conference of State Legislatures 31 state legislatures National Conference of State Legislatures control most statehouses National Conference of State Legislatures just seven states Democrats predominantly Republican state legislatures National Conference of State Legislatures NCSL data National Conference of State Legislatures this source National Conference of State Legislatures National Conference of State Legislatures predominantly Republican state legislatures predominantly Republican state legislatures just seven states 30 states, versus 18 controlled by Democrats control very little in the states 14 state legislatures red-dominated map absent still have the upper hand in state capitals Jan 2018 Legislative Partisan Composition relevant three state legislatures purple states state legislatures? National Conference of State Legislatures State Partisan Composition two-thirds of states 2017 partisan composition National Conference of State Legislatures National Conference of State Legislatures a majority of state legislatures National Conference of State Legislatures National Conference of State Legislatures 22 states National Conference of State Legislatures State Partisan Composition state legislatures National Conference of State Legislatures National Conference of State Legislatures just seven states a very recent development relevant just seven states State Partisan Composition National Conference of State Legislatures 30 states, versus 18 controlled by Democrats 61 legislative chambers are GOP with 37 being Democrat all 14 of these states 2017 partisan composition Source watch how "State Partisan Composition" National Conference of State Legislatures Available online. the National Conference of State Legislatures National Conference of State Legislatures National Conference of State Legislatures vast majority