Delaware is a blue state. This SurveyUSA poll clearly shows that Delawareans are "on to" Bush. Nevertheless Bush lackey, Michael Castle easily cruises to reelection year after year. Why? Delathought
provides a number of the puzzle pieces in this post, and an anon poster fits them into place. "... it strikes me that Castle's non-moderate budget and tax votes are very likely the result of a deal - i.e, the price he has to pay for being granted permission to (ineffectually) take moderate positions on other issues less important to GOP leadership.
GOP leadership is highly motivated to play along with Castle's occasional "moderate" votes, because that's how Castle keeps his seat in a blue state. Without the occasional covering "moderate" vote, Castle's seat would surely be filled by a Democrat.