Obama introduces running mate Biden
SPRINGFIELD, Ill. Barack Obama introduced Sen. Joe Biden of Delaware on Saturday as a man ''ready to step in and be president,'' and the newly minted running mate quickly turned his campaign debut into a slashing attack on Republicans seeking four more years in the White House.
Democrats gathered in Denver Monday to formally nominate Barack Obama as standard-bearer, but Republican opponent John McCain was giving no peace -- sniping away with new ads to stir discord over the Illinois senator's choice of Sen. Joe Biden as a running mate.