We should be able to turn western Wisconsin and the Minnesota Iron Range. Those are two key swing states that are within reach.
We actually have already taken the lead in Wisconsin. The rats were only able to hold on in the last 2 elections through fraud -- Milwaukee in 2004 and Madison in 2000. All we have to do now is either stop the fraud or build enough of a lead that they can't cheat. (See the Hewitt book).