SAN FRANCISCO -- Mike Huckabee brushed off predictions Thursday that he would drop out of the Republican presidential nominating contest, but dropped new hints that he'd prefer John McCain to Mitt Romney as the party's eventual pick. Huckabee, who hasn't won a caucus or primary since Iowa, emphatically dismissed the suggestion that the GOP race was a two-man contest, with Rudy Giuliani out of it and questions about whether he was sticking it out to angle for a running mate spot. "I'm staying in the race because I still think I can win," he told an enthusiastic audience of about...