Democratic presidential contenders Hillary Clinton and Barrack Obama vowed to knock off their racial jawing and sniping at each other before their Las Vegas debate. And they should. Now they should start talking about racial profiling, affirmative action, housing and job discrimination, the racial disparities in prison sentencing, the HIV/AIDS epidemic, health care for the poor, failing inner city schools, and ending the racially-marred drug sentencing laws, and what they intend to do about them. They only pecked around the edges at these issues in Las Vegas.