MS NOW

South Carolina is first big test for Sanders among black voters

The polls are tight, but if Sanders wants to become a true threat to Clinton for the Democratic nomination, he must gain more black support.

A man places signs supporting Hillary Clinton for the democratic presidential nominee outside the Gaillar Center prior to tonight's Democratic debate on Jan. 17, 2016 in Charleston, S.C. (Photo by Andrew Burton/Getty)
A man places signs supporting Hillary Clinton for the democratic presidential nominee outside the Gaillar Center prior to tonight's Democratic debate on Jan. 17, 2016 in Charleston, S.C.Getty Images

Perry Bacon