In view of 06 and 08, with Bush pushing on amnestry at key points in time, Bush is the Dem’s best friend.
I'm not so sure. The Dems were planning on running their presidential campaign with the saddling of whoever the Republican candidate was with Bush, whose popularity will probably be in the single digits by election time. The amnesty bill has forced most of the Republican contenders to move sharply away from Bush. If they are smart, by election time the Republican candidate will have moved so far away from Bush that the Democrats will be unable to use support of Bush in their campaign.
Bush, inadvertently, has not only galvanized the base but has helped to start a coalition, based on anti-amnesty anger, that includes Independents and "Reagan Democrats". If this coalition can be nurtured by a perceptive candidate, the Democrats will be in trouble come election time.