President Barack Obama's political organization pledged on Saturday an "all out" effort to elect the Democrat in Tuesday's special election in Massachusetts.



In a letter to supporters, Mitch Stewart, the director of Obama's Organizing for America group, asked for donations to fuel a massive operation on behalf of state Attorney General Martha Coakley, the Democrat running to permanently fill the late Sen. Edward Kennedy's (D) seat in the Senate.



"OFA is going all out in Massachusetts -- we're sending organizers, knocking on doors, and making phone calls by the tens of thousands to make sure that folks know how to participate," Stewart wrote.



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The fundraising appeal reflects the urgency among Democrats ahead of Tuesday's special election, where upstart Republican candidate Scott Brown has come within striking distance of Coakley in the traditionally-Democratic state.Stewart acknowledged the "uncertain" outcome in the race in his plea."With the outcome uncertain and the stakes sky high, I don't want to wake up the morning after the election thinking that we could have done something more," he said. "If you feel the same way, please donate $5 or more to help us make Martha Coakley the next senator from Massachusetts."Brown's challenge has made Democrats nervous that they could lose their 60-vote, filibuster-proof majority in the Senate, especially as lawmakers look to finish the drawn-out effort to pass healthcare reform legislation. Brown has campaigned in part on being able to block that legislation if elected.

Aiding in Democrats' push, President Barack Obama will travel to Massachusetts on Sunday for a 3 p.m. campaign event on behalf of Coakley.

