– It hasn't happened in more than a century, but next year, just one state in the US will have a divided legislature. That state is Minnesota, where Republicans retained control of the state Senate in Tuesday's elections while Democrats flipped the House; all the other state legislatures will be under single-party control. That's a first since 1914, the National Conference of State Legislatures announced on Twitter. Five state legislative chambers flipped from Republican to Democratic Tuesday. Next year, 18 state legislatures will be controlled entirely by Democrats, while 31 will be controlled by Republicans, the Week reports. (Tuesday's blue wave "hit a red wall.")