Disheartening, I like none of them. John Boehner should be top of the list but he isn't even on it. Party is a disaster.
Just one? How about an even dozen? Bush, McCain, Obama, Iraq, deficeits, recession, Afghanistan, Pelosi, Reid, Pakistan, Biden, bailouts. If the GOP had stood firm for it's core beliefs of limited government, liberty, a strong national defense, secure borders, property rights, etc. we'd be in a better place.
Not that we'd be perfect, or Obama wouldn't be in office, or Iraq would be a green meadow filled with butterflies and unicorns. My point was more along the lines of as the GOP has wandered from the path of freedom, so has this country and so has the rest of the planet. All continue to suffer as a result of this choice.