Martin is leaving the Congressional Black Caucus with ambition of becoming Northwest Chicago 's mayor . Rahm Emanuel says it wo n't be as easy as some people think . And of the top 23 wards with registered voters , African-Americans control a majority in 12 . He says Emanuel faces a challenging field and has some handicaps . Roland Martin : Emanuel will have to work to win confidence of Chicago 's black population .
Martin is leaving the Congressional Black Caucus with ambition of becoming Northwest Chicago 's mayor . Rahm Emanuel says it wo n't be as easy as some people think . He says Emanuel faces a challenging field and has some handicaps . Roland Martin : Emanuel will have to work to win confidence of Chicago 's black population .