"Here's the rub, though: Each state gets to determine how its electoral votes are allocated. Currently, 48 states and DC use a winner-take-all system in which the candidate who wins the popular vote in the state gets all of its electoral votes. Under the Republican plan—
which has been endorsed by top Republicans in both houses of the state's legislature, as well as the governor, Tom Corbett -- Pennsylvania would change from this system to one where each congressional district gets its own electoral vote. (Two electoral votes—one for each of the state's two senators—would go to the statewide winner.)
This could cost Obama dearly. The GOP controls both houses of the state legislature plus the governor's mansion—the so-called "redistricting trifecta"—in Pennsylvania. Congressional district maps are adjusted after every census, and the last one just finished up. That means Pennsylvania Republicans get to draw the boundaries of the state's congressional districts without any input from Democrats. Some of the early maps have leaked to the press, and
Democrats expect that the Pennsylvania congressional map for the 2012 elections will have 12 safe GOP seats compared to just 6 safe Democratic seats."
--snip--
"It doesn't necessarily end there. After their epic sweep of state legislative and gubernatorial races in 2010, Republicans also have total political control of Michigan, Ohio, and Wisconsin, three other big states that traditionally go Democratic and went for Obama in 2012. Implementing a Pennsylvania-style system in those three places—in Ohio, for example, Democrats anticipate controlling just 4 or 5 of the state's 16 congressional districts—could offset Obama wins in states where he has expanded the electoral map, like Virginia, North Carolina, Colorado, or New Mexico. "If all these rust belt folks get together and make this happen that could be really dramatic," says Carolyn Fiddler, a spokeswoman for the Democratic Legislative Campaign Committee, which coordinates state political races for the Dems."
http://motherjones.com/politics/2011/09/gop-electoral-college-plan-beat-obama-2012If they were to do this in more states than Pennsylvania (and they have the power to unilaterally do so in several Democratic electoral college lynchpins), it might be almost impossible for a Democrat to win the Whitehouse in a non-landslide election. I have been playing with the map, and it looks like in the worst case scenario, Republicans could make it so even if Obama wins all the Kerry states and Gore states, plus Nevada, Colorado, Virginia, and Ohio (!), Obama (or our 2016 nominee) would still lose. He would have to win Florida, which he only barely won last time in one of the best years for Democrats in decades.