Red and blue states are fighting over redistricting, with an eye on this year’s midterm elections. The majority party’s strategy in each state is to maximize its advantage by changing the boundaries of the other party’s congressional districts. The redrawn districts dilute historic voters of the opposition party so much that they almost needn’t bother showing up on Election Day.

Yet there’s another pre-voting contest that is getting far less attention in the press: the one where Americans are voting with their feet.