How many more will follow?

This is the first I've heard of that have publicly left the Republican Party. I wonder how many more will follow before the election.

Washington, D.C. Councilman David Catania, once the GOP's top fundraiser in the District, officially quit the Republican party Wednesday over its continuing attacks on gays. [...]

“For some time, the leadership of the Republican Party has been dominated - and I believe very adversely - by a single, narrow group of individuals, who show no interest or concern for issues that confront a diverse nation,” Catania said in his statement.

“The time has long since past for me to stop believing that by working within the Party, I can be an agent of change.”

“Empty words and rhetoric are all that are left of the once proud Republican Party and I am no longer willing to associate myself with it. I shall, therefore, continue my public service as an Independent.” (source)