The Senate got the coverage. Six southern governors got the power.

The new Senate majority was last week's leading headline. When Democrats won it, along with the House, on Election Day, it was hard to find a bigger story.

But the more durable midterm election result is a Democratic majority of governorships that hasn't existed in more than 15 years. Voters appointed six new governors in the southeast region, both Democratic and Republican, where American companies are building. Each inherits an unfinished argument about who pays, and each works with a legislature that, unlike Congress, will actually pass something...