Swing counties in swing states

We often talk of the swing states, but the key to those states also have swing counties that should be closely looked at. Today Politico released polls in two swing counties in North Carolina and Nevada. According to these new polls, Obama has taken the lead in Wake County, North Carolina and Washoe County, Nevada. These are large gains for Obama due to the fact that they were counties won by President Bush in both previous elections. Politico highlighted that these two counties are suburban and exurban areas of the states, which Obama is doing very well in. These polls also showed that "Obama posts wide leads among female voters and independents, and holds even with McCain among male voters."