message of change and new direction for america. >> it's been just five days since democrats took control of both houses of congress but already the focus is shifting to the next big political prize, the white house. >> when the election season begins in 2007, the climate is not very good if you are a republican. the war in iraq is very unpopular, and many democrats think they can win the presidency. >> senator biden now joining a growing list of democratic candidates who are announcing their intentions for '08. >> on the democratic side you had a lot of candidates. you looked at all these people who were running and you thought in the end this is going to be hillary clinton's time. >> it's been no secret hillary clinton would run for president but today on her website she made it official. >> i'm not just starting a campaign, though, i'm beginning a conversation. >> after six years as a senator