four hours during and after the debate. it was quite a haul. in washington today, vice president joe biden joked he was in a rush to meet the president. >> i have a luncheon date with a guy i'm unable to say no to. >> reporter: no hint of any decision on his own oval office ambitions as he weighed in on the to herbal the rivals big night. >> i thought they all did well. >> reporter: it was hillary clinton center stage as she pushed back on criticism she frequently changes possessions. >> are you a progressive or moderate? >> i'm a progressive but a progressive that likes to get things done. >> trying out a defense of her 2002 vote to authorize the war on iraq. >> i recall very well being on a debate stage i think about 25 times with then senator obama debating this very issue. after the election, he asked me to become secretary of state. >> reporter: she hit her chief rival early on taking aim at his