Have tough sentencing laws harmed black Americans?  Well, without them, an estimated 129,000 blacks would be dead today, says Heather Mac Donald of the Manhattan Institute.  Speaking last week on 'The O'Reilly Factor,' Mac Donald discussed violent crime and incarceration, where she answered the charge of the media and the liberal left that sentencing laws are racist when, in fact, tough sentencing laws have resulted in historically low crime rates that have primarily benefited law-abiding blacks in inner cities.  Watch the segment here.