The Club For Growth appears to be becoming a little reluctant about getting involved in the Florida Senate Republican primary, the Tampa Bay Tribune reports, in the wake of moderate Gov. Charlie Crist's $4.3 million haul for the last quarter, compared to his more conservative opponent Marco Rubio's mere $340,000.

"We have to look at his race versus all the others we're interested in, and there are going to be a lot of competitive races," said Club executive director David Keating. He further explained: "We look for the most bang for the contribution buck - a race we think can be competitive."

Keating said that more important than Crist's fundraising figures is the amount that Rubio himself can bring in, and whether he can raise enough to get his message out -- which Keating estimated to be in the $4-5 million range.

So all Rubio needs to do is raise a few million on top of his $340,000, and he should be set.