Obama and Black Voters: Beginning of the End?

The Washington Post's Jonathan Capehart has this post about Representative Maxine Waters asking black voters at a job fair in Detroit the permission to put pressure on the President.  As reported by Capehart, Representative Waters said:

We don’t put pressure on the president. Let me tell you why. We don’t put pressure on the president because y’all love the president. You love the president. You’re very proud . . . to have a black man [in the White House] . . . First time in the history of the United States of America. If we go after the president too hard, you’re going after us. . . . When you tell us it’s all right and you unleash us, and you tell us you're ready for us to have this conversation, we’re ready to have the conversation. . . . All I’m saying to you is, we’re politicians. We’re elected officials. We are trying to do the right thing and the best thing. When you let us know it is time to let go, we’ll let go.

Caphart reports that she received permission, at least from those at the jobs fair in Detroit.  The President has lost some support from the black community, but not too much.  Are black voters starting to take defect?  Is the high-profile criticisms of the President by Dr. Cornel West and Tavis Smiley starting to soften the President's support in the black community?

UPDATE: See this article in Huffington Post.  There seems to be a concerted effort by black political leaders in Congress to be more vocal and public about their criticism of the President.  It might be that these leaders are feeling increasing pressure from their constituencies and thus pointing the finger at the President.  But this is definitely something to pay attention to.