Maddow: The far-right Club For Growth has launched the "Primary My Congressman!" initiative,

in which the group highlights Republican members of Congress who are insufficiently conservative by the group's standards. "Big government liberals inhabit the Democratic Party, but they are far too common within the Republican Party as well," Chris Chocola, Club For Growth's president, said in a statement.

Club For Growth hunts for “RINO” challengers

The conservative advocacy group Club For Growth is targeting moderates that they’ve labelled as “RINOs,” or “Republicans In Name Only,” and calling for conservative candidates to mount challenges to them in the primaries.

Club For Growth launched the initiative through a website, “Primary My Congressman!”, which will regularly feature Congressmen with low ratings from the group. The idea is to target moderates in districts that are safely Republican, so conservative primary challengers will have a good shot at winning in the general election.

The first batch members targeted by Club For Growth are Reps. Mike Simpson, R-Idaho, Adam Kinzinger, R-Ill., Rick Crawford, R-Ark., Frank Lucas, R-Okla., Steve Palazzo, R-Miss., Martha Roby, R-Ala., Larry Bucshon, R-Ind., Renee Elmers, R-N.C., and Aaron Schock, R-Ill.

This is the flip side to Karl Rove’s plan to protect establishment Republicans in the primaries by raising big bucks from GOP donors, and crushing ultra-conservative candidates who don’t have a chance in the general election. One prime example of this was in the 2012 elections, when Club For Growth backed Indiana Republican Richard Mourdock through his primary win against Dick Lugar, but saw Mourdock ultimately lose in the general election after he offered some questionable theories about rape.

http://www.salon.com/2013/02/27/club_for_growth_hunts_for_rino_challengers/

Looks like the Club for Growth will restrict its support to conservative congressional districts where any republican will probably win. (Quite a few of their senate candidates imploded last year, so perhaps they don't want to go there again any time soon.)

It's hard to imagine that there are any 'moderate' republican congressmen in such districts to begin with. To the extent there are, I suppose they will act more conservative now in fear of a primary challenge from the right. That would be bad for the country but even worse for the future of the republican party since most voters think it is out of touch already.