Misspelled, to be sure. Otherwise it's not really authentic.
The website where I found this:
http://gawker.com/...
The text of the sign - Congress = slaveowner taxpayer = uh, a certain derogatory term for African-Americans starting with "N" that is considered profane, even when misspelled, as it is in the link.
Damn, what a moran.
UPDATE: It was suggested that I at least put the money quote from the article in my diary, so here it is:
And the guy holding the sign? He is Dale Robertson, who is the self-described "President and Founder of the Tea Party." He owns and operates TeaParty.org.
UPDATE #2 - Wow! Rec list! Thanks, y'all!
UPDATE #2 and a half - Some have noticed that the offending word was pasted to the poster. Sure looks that way. Why would this be? To attempt to make the original photographer look bad by later going on Hannity claiming it was photoshopped, or to hide the evidence of his transgression should the resulting heat become unbearable? Who knows? It could also be hiding a version of the word that wasn't quite legible. Keep yer eyes peeled.