By 2016, the Democrats, more or less exactly as they are now ideologically, will become thought of as the “conservative party.” There’ll be a rump GOP running local races in the south and the inland west. There’ll be a new leftish party, probably called the Green Party but with little or no organizational link to the group calling itself that now. These other two parties will field Presidential candidates, and even pick up Electoral College votes for them. But for a while, only the Dems will be national enough to control the Presidency.