Since the 1980s, African-American groups have pressed television networks and Hollywood studios -- with relative success -- to produce shows and films that more accurately reflect the nation's demographics. Those efforts carried over to boardrooms, corner offices and nearly everywhere minorities were deemed underrepresented. Politicians took notice. But as President Obama -- who after all is nothing less than the nation's first African-American president -- puts the final touches on his second-term Cabinet, black political leaders say that aside from Attorney General Eric Holder, there's a lack of diversity in the group. They see the top job at the Department of Transportation as an ideal spot for one of their own.