Did the election of Barack Obama indicate the "triumph of black politics"? What types of opposition did/does Obama face as president and why?

Did the election of Barack Obama indicate the "triumph of black politics"? What types of opposition did/does Obama face as president and why? How does the Obama presidency differ from his two predecessors (Clinton and George W. Bush) in matters of race? Is this only an issue for "older" generations, or does it cross all age divides?