GOP upheaval: The brothers Diaz-Balart dump Crist, Rand Paul winning in Ky.

First: Rand Paul leading the NRSC-backed GOP candidate in Kentucky by 19 points in a new poll of Republicans.

Second: GOP Reps. Lincoln and Mario Diaz-Balart both withdraw their endorsements of Gov. Charlie Crist, R, the NRSC-backed candidate for governor in Florida.

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