I think your cynicism has some validity, but you appear to have gone a bit over the top on Bush deliberately engineering 06 losses.
Some of them--Rep Hayworth, successfully.
Coburn, unsuccessfully.
Rove warned all amnesty opponents not to run on the issue or criticize the "Surrender to Mexico" GWB policy, or they'd lose support of the RNCC and RNSC.
Strategy--run an amnesty-sympathetic Rovian National Committee candidate in the primaries, and try to dry up the anti-amnesty candidate's money. Then, if the anti-amnesty candidate did actually win the primary, allow no money for him in the general election as punishment. After the RNC hands the seat to the Democrats, put out lots of media spin that opposition to amnesty is a losing issue. Well, it sure was, wasn't it?
We'd have probably still lost seats. But I wonder if we would have lost so many, if the RNC was actually loyal to Republicans?
Remember Tony Snow the morning after the election...? Remember his chirpy jubilation...."At least now we can move forward on immigration reform."
WE WAS FRAGGED.