Has Obama Lost His Luster Among Black Voters?

SEE HERE The American Thinker has a piece claiming Romney will run away with it in November because Obama has lost the lock he had on the Black vote.  It's something that is a real possibility since Black workers are experiencing more serious unemployment than White voters.  I'm not sure why.  Obviously some will claim it is due to racism but Thomas Sowell long since pointed out that that didn't work.  More likely it is due to the demographics of the employment profiles of Blacks.  If they are disproportionately working in industries that have been hard hit then that would show up as disproportionate unemployment.  But that's just speculation on my part.  There can be little doubt that Obama has been a disappointment, not just to Black voters but to all those who saw him as a new kind of politician that would heal and unite instead of wound and divide.