In creating his now iconic Obama "Hope" poster, Shepard Fairey went from being a cult street art figure to a artist synonymous with Barack Obama’s revolutionary 2008 presidential campaign. But the artist, whose stylized portrait was emblematic of change, said he hasn't been wowed by Obama's performance in the White House thus far. “Obama is to me a quality human being and someone that, given the limitations of the two-party system, that’s trying to do a good job,” Fairey told Niteside at a book signing at the Brooklyn Museum on Sunday. “But I have to grade the whole thing on a curve becau