You have it backwrds, the RNC, Senate & Congressional committies, Bush/rove and the Business establishment all hate all conservative Republican candidates.
You have it wrong. The RNC supports INCUMBENTS like Santorum, Talent, Kyl, Burns, Hutchinson, etc.
They do not like McCain who is also on the conservatives' $hit list.
They do not like mavericks or loose cannons like mccain, tancredo, harris, pat buchanan, pete mcclosky, etc.
The RNC will try to take down the "rebels without a cause" or as I prefer "the rebels without a clue" and that includes Katherine Harris.