Today we posted the July 2014 update to our state legislative aggregate ideology data. One of the major features to this data release has been the incorporation of much more current roll call (1993-2013) and candidate survey (1996-2014) data. All in all, we have added about 25% more chamber-years of data.
Here’s a look at the average legislative ideology nearly all 50 states that we have data on in 2013-2014 (the data is from 2013 but nearly all states have elections in even-numbered years, hence the data apply to 2014 as well). Higher numbers are more conservative, lower numbers are more liberal. In 2013, Oklahoma had the most conservative state legislature, followed by Arkansas, Tennessee, and Idaho. If Congress were a state, 18 states would be more conservative than it!
New York was the most liberal state legislature in the country, followed by Connecticut, California, Vermont, and Hawaii.
And the equivalent plot for polarization in 2013.
California, once again, leads the country in the ideological divide between the Republican and Democratic parties. Colorado and Arizona are close behind, gaining ground over time.
At the other end, Rhode Island, Arkansas, and Louisiana represent the least polarized legislatures. Note that Nebraska is not in this group. This is despite the fact that the Unicameral is officially nonpartisan in its organization and elections. Nebraska’s hidden parties are polarizing quite quickly.