...or perhaps some of his supporters and then the media picking up on that?
You need to be very certain and provide specific incidences of Obama *himself* playing the race card. Otherwise, you're just projecting.
Please remember that no matter how many times Hillary Clinton, her surrogates (Ferraro, Johnson, Rendell), and her supporters lie, the Clintons enjoyed nearly 80% support from the black community. Because of the Clintons' subtle form of racism and clandestine attempts to turn Obama into "The Black Candidate," they alienated most black people who defected to Obama.
I still have never seen any SPECIFIC cases where Obama HIMSELF used the race card. And I also want to know SPECIFIC instances where his surrogates EXPLICITLY injected race into the discourse.