By Zachary A. Goldfarb Former Democratic presidential candidate John Edwards said it is likely Sen. Barack Obama (Ill.) will be his party's nominee, and he warned Sen. Hillary Rodham Clinton (N.Y.) against hurting the party's chances in the fall by staying in the race. "I think it is likely, certainly, at this point, that Senator Obama will be the nominee," said Edwards, a former North Carolina senator and two-time presidential candidate. He added on CBS's "Face the Nation," "I think the one thing that [Clinton] has to be careful about … is that, if she makes the case for herself, which she's completely entitled to do, she has to be really careful that she's not damaging our prospects, the Democratic Party, and our cause, for the fall." Edwards said Clinton has been making "a pretty compelling case for her candidacy," but "you can no longer make a compelling case for