The New Republic
The electoral map divides the country neatly into blue states and red states. But blue states include vast conservative stretches; and most red states harbor liberal enclaves, too. In recent years, as partisan polarization has grown, some political minorities in these disaffected areas have proposed a radical solution: state partition.
It has happened before. Maine, for instance, was once part of Massachusetts. And while none of the current movements really has a shot, the eleven instances mapped here (including that to grant the District of Columbia statehood) have at least attracted the support of elected officials.
What would happen if all of them succeeded? Each new state would get two senators and its share of electoral college votes. We ran the numbers and recalculated the 2012 presidential race.
In this bizarro United States, the GOP would have a structural advantage in the expanded Senate, and Barack Obama would have had a tighter fight against Mitt Romney in the electoral college (which he won, in reality, 332–206).