Living in Delaware, I get only a few direct mailings each year for the state and county races. (Most towns up here are governed and policed 100% by the county, with no borough councils, mayors, or the like.) The national races aren't even close, with the only one in recent memory being when ex-governor Tom Carper beat William Roth (for whom your Roth IRA is named) six years ago. (And had Roth won, he'd've died in office shortly thereafter anyhow, probably opening the door for Carper at that point since Carper's Lt.Gov won the governorship that same year). In fact, check out this article about the lack of negative Delaware campaigning.
Of course, I get all the TV mudslinging for Pennsylvania and Jersey pols, but Tivo takes care of most of those (live sporting events notwithstanding).