After a 3 second search, I couldn't find the quote, but I recently read a quote from Hitchens saying he had no political party, and was just a rationalist.
He's said it in many ways at different times, but he seemed to characterize himself as a partisan of Enlightenment values of rationality and freedom over faith and force.
This quotes him as saying,
"I'm a member of no (political) party. I have no ideology. I'm a rationalist. I do what I can in the international struggle between science and reason and the barbarism, superstition and stupidity that's all around us."
Having been diagnosed with cancer last year, writer Christopher Hitchens has died. He was known as as an outspoken atheist, which is not, in itself, identical to being a committed rationalist in any systematic way. Even so, he seemed to have the virtue of moral courage, the willingness to speak the truth as he saw it, without fear.