I am just posting to share some websites with great information about partisan balances in state legislatures.
First, if you can't figure out how to navigate through Ballotpedia, you might not come across this page:
https://ballotpedia.org/Partisan_composition_of_state_legislaturesNext, there is a link on the Ballotpedia page to this site by the folks at the NCSL organization:
http://www.ncsl.org/research/about-state-legislatures/partisan-composition.aspxFinally, on the NCSL site, these three timelines are good historical information:
2002 - 2014
http://www.ncsl.org/documents/statevote/legiscontrol_2002_2014.pdf1990 - 2000
http://www.ncsl.org/documents/statevote/legiscontrol_1990_2000.pdf and finally,
1978 - 1988
http://www.ncsl.org/documents/statevote/legiscontrol_1978_1988.pdfHard to envision that in Jan 1990 (so post Bush's 1988 election) the only Republican controlled states (both houses) were Arizona, Colorado, New Hampshire, South Dakota, Utah, and Wyoming. Democrats controlled 29 and 14 were split. I have a tough time grasping that, for instance, Idaho, Kansas, and North Dakota were not under GOP control. Things do change!