There are more states under single-party control now than at any time since WW2

When you speak of "single-party control" in state politics, you mean both houses of state government (House/Senate) and the Governor's office. Just before the 2010 midterm elections, the Republicans had nine such states. Today, they have 23. Via Mother Jones, they may soon get Iowa and Arkansas. Here's the current map:

If Iowa and Arkansas swing, that wo…