From this: Over the past few weeks, Florida GOP Gov. Charlie Crist has found himself being put on the defensive more and more in the primary thanks to the challenge by ex-state House Speaker Marco Rubio. While Crist has financially overwhelmed Rubio to date, there are many Republicans -- particularly those in Flordia that are close to former GOP Gov. Jeb Bush -- who have publicly become more comfortable airing their skepticism about Crist in public. One of those Republicans with close ties to the Bush family, Karl Rove, has signaled his preference with his wallet. Rove confirms to NBC News...