Yes, Harris, Hitchens and Dawkins. Have a look at this article and tell me whether, apart from the acceptable closing paragraph, it does not contain the worst arguments against atheistic politicians you ever read:
http://www.townhall.com/Columnists/MichaelMedved/2008/04/09/americans_are_right_to_resist_an_atheist_as_president. Personally, I cannot think of a reason why an atheist should not be a national leader, except for the purely practical one that almost every atheist I meet is made in the image and likeness of the Sorry Trinity - obsessional, ignorant and intolerant. But unless you can write better arguments than Medved manages, then - remember the proverb? Better shut up and look like a fool than open your mouth and remove all doubt.