COLUMBIA, S.C. - Democrat Hillary Rodham Clinton gathered emotional endorsements Friday from two prominent black women who implored blacks to set aside their excitement about her rival Barack Obama's campaign to be the first In the run-up to Saturday's South Carolina Democratic primary, the first in which blacks could play a pivotal role, Clinton has spoken to mostly white audiences while her husband, Bill, the former president, has courted blacks. But that changed Friday when she made an explicit pitch for black support in a speech at a historically black college in South Carolina's state capital surrounded by prominent black...