Democrat Martha Coakley and Republican Scott Brown are crisscrossing Massachusetts in a last-minute scramble for votes in a race that has drawn national attention.
Brown has promised to be the 41st vote against Obama's health care rationing plan, while Coakley has pledged to be the 60th vote for it. The surge by Brown has been so alarming to Democrats that Obama put his political capital on the line to visit the state.
The seat opened up with the death last year of Edward M. Kennedy, the liberal lion of the Senate, who had served for 47 years. Democrats in Washington are already discussing how to pass the health care bill even if Brown is elected.
Indepdendent candidate Joseph L. Kennedy, who is no relation to the famous Kennedy clan, is also in the race, but has gained minimal support.