Reid Wilson over at the Hotline:

Being endorsed by the NRSC is becoming akin to the mark of the beast, and conservative activists have found new reason to cry foul at Sen. John Cornyn’s (R-TX) committee.
The NRSC has set up joint fundraising accounts with several candidates, generating attacks from others within the GOP who say DC should not be dictating who makes it through tough primaries. The committees, they say, show clear favoritism for one candidate over another.
In NH, an advisor to atty Ovide Lamontagne (R) blasted the NRSC for setting up a joint fundraising committee with ex-AG Kelly Ayotte (R). In CA, Assemb. Chuck DeVore (R) is getting help from conservative blog RedState over a similar account the NRSC set up with ex-HP CEO Carly Fiorina (R). And another joint account that will partially benefit KY Sec/State Trey Grayson (R) will anger backers of ophthamologist Rand Paul (R).
The NRSC has also set up joint committees with Rep. Mark Kirk (R-IL), ex-NV GOP chair Sue Lowden (R), Rep. Roy Blunt (R-MO), ex-Rep./ex-OMB dir. Rob Portman (R-OH) and ex-Rep. Pat Toomey (R-PA). All but Toomey have rivals in the GOP primary, but all except Lowden are front-runners by wide margins. Lowden has yet to lock down a healthy lead since entering her race.
These are the latest flare ups in an ongoing war between grassroots activists and the GOP’s professional class. The NRSC has only explicitly endorsed 1 candidate — FL Gov. Charlie Crist (R) — but other candidates have fled from any notion of DC-based backing…..