Quoted from lilliah's entry, here:
As of today, after 25 years, I am no longer a Republican.
I take this step with deep regret, and with a deep sense of betrayal.
I still believe in the vast power of markets to inspire ideas, motivate solutions and eliminate waste. I still believe in international vigilance and a strong defense, because this world will always be home to people who will avidly seek to take or destroy what we have built as a nation. I still believe in the protection of individuals and businesses from the influence and expense of an over-involved government. I still believe in the hand-in-hand concepts of separation of church and state and absolute freedom to worship, in the rights of the states to govern themselves without undo federal interference, and in the host of other things that defined me as a Republican. (Hello! That's a REAL Republican, damnit. A respectable one!)
My problem is this: I believe in principles and ideals which my party has systematically discarded in the last 10 years.
My Republican Party was the party of Abraham Lincoln, Teddy Roosevelt, Dwight Eisenhower, Barry Goldwater, and George H.W. Bush. It was a party of honesty and accountability. It was a party of tolerance, and practicality and honor. It was a party that faced facts and dealt with reality, and that crafted common-sense solutions to problems based on the facts as they were, not as we wished them to be, or even worse, as we made them up. It was a party that told the truth, even when the truth came hard. And now, it is none of those things.
Read more in the original entry here.