NEW : Barack Obama , John McCain , roses at ground zero . New polls show both candidates with slim leads in key battleground states . They were joined by Cindy McCain and New York City Mayor Michael Bloomberg . Biden speaks with first responders in Parma , Ohio . Sarah Palin back in Alaska for son 's deployment ##s .
NEW : Barack Obama , John McCain , roses at ground zero . New polls show both candidates with slim leads in key battleground states . Biden speaks with first responders in Parma , Ohio . Sarah Palin back in Alaska for son 's deployment ##s .