From the incomparable GOP pollster John McLaughlin:

Rich,
In our poll for Casey Cagle that had him up 8 with a week to go, there was no liberal Democrat crossover. It was only 1% Democrat and 83% Republican. Only 5% claimed to be liberals. 75% claimed to be conservative – 46% said they were very conservative. 67% were prolife. 80% were religious Protestants. 60% of the total vote were Born-again Christians. This is the most conservative and religious primary electorate that I have polled all year. The Democrats voted in their primary, not this one.
Casey Cagle won precisely because he is a conservative Christian that they could trust. Georgia conservatives did not want to be manipulated any longer. They cherish their integrity and values. They did not want to see their values and votes sold out.
Casey Cagle won decisively by standing up for Christian conservatives and their values of which the most important one was honesty. Casey Cagle should be complimented for his courage and for defending our movement. Georgia Republicans and conservatives have spoken loud and clear. They have rejected the corruption of our movement and they should be praised for their wisdom.
Inside the beltway conservatives need to get away from Washington and back to the grassroots. Anything else is just spin.
This year the Democrats plan to use honesty as an issue to win elections. Georgia Republicans and conservatives have decided that they are not going to give them that issue. That’s why Casey Cagle won.
Casey Cagle won as a conservative among conservatives. National conservative leaders like Steve Forbes campaigned for him and within Georgia grass roots conservatives carried him.
This election is the beginning of a Republican reformation. We must hope it happens across the country to benefit our movement and party in November.