It has been widely attributed to a writer in a Czech newspaper:
http://oneida.wisgop.info/2010/06/12/the-danger-to-america-is-not-barack-obama-but-a-citizenry-capable-of-entrusting-a-man-like-him-with-the-presidency-it-is-less-likely-to-survive-a-multitude-of-fools-such-as-those-who-made-him-th/
http://www.americanthinker.com/2011/04/will_ignorance_lead_to_a_secon.html
Thank you, WXRGina. I will add that information next to the quote in my files.