I know that right now he is focused on his campaign for the Presidency, but he will probably know whether or not he is in position to win the Democratic nomination sometime between January 3rd and February 5th. The deadline for getting into the Senate Race in North Caroline against Libby Dole is February 29th.
In 2009, the Senate will be the deciding body for a large number of progressive proposals from Universal Health Care to Restoring our Civil Liberties and Energy Independence. We need more strong progressives in the Senate to help fight to make these reforms law and to make sure that we can pass the best possible versions of these reforms.