He got where he is by getting his opponents disqualified (or letting them disqualify themselves).
Alice Palmer was kept off that ballot.
Blair Hull's and Jack Ryan's divorce papers were made public.
Alan Keyes didn't have a chance.
John McCain really didn't want to win.
Obama didn't need to scream much of anything. He got where he is because the machine was looking out for him.
If you really want to see politicians who've gotten ahead screaming racism, there are plenty of them out there.
If you look at the root of Obama’s public persona, its about race relations. Meaning, he screams racism.