Divided government still rules in the nation’s capital after last week’s Tuesday’s vote, but unity is increasingly the name of the game in cities such as Annapolis, Topeka, Concord and Little Rock. In a little-noticed footnote to last week’s election, state legislature elections this year have produced the highest number of states with one-party rule in 60 years. Democrats or Republicans now have sole control of the governorship and both legislative chambers in 37 state capitals around the country. According to the National Conference of State Legislatures (NCSL), which tracks party representation in the country’s 50 state governments, Democrats now...