South Carolina is about as far as you can get from an anti-incumbency state :)
For almost the entire period I'm talking about, both of SC's Senate seats were occupied by the same two Senators, Strom Thurmond and Fritz Hollings, who kept getting re-elected over and over. It's been less than a decade since either of their replacements got in, and both of them are still in (the one who's running for re-election this year, Jim DeMint, is polling ahead of his rival by more than 2-to-1, so he's certain to be re-elected).
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For almost the entire period I'm talking about, both of SC's Senate seats were occupied by the same two Senators, Strom Thurmond and Fritz Hollings, who kept getting re-elected over and over. It's been less than a decade since either of their replacements got in, and both of them are still in (the one who's running for re-election this year, Jim DeMint, is polling ahead of his rival by more than 2-to-1, so he's certain to be re-elected).
Alaska's not it either, see above.