For the hour of Wednesday's State of the Union address, MSNBC anchor Chris Matthews said he "forgot" President Obama was black, causing a wide range of responses (including some on our show) the next day. Do we all need to forget about race to be post-racial? Or do we just need to acknowledge and accept people's race?

President Obama's State of the Union Address last night prompted a wide range of comments on style and policy.  But maybe the most surprising came from MSNBC Chris Matthews, who said he "forgot that he was black tonight for an hour." We ask Morehouse College professor David Wall Rice.