Political blog

Forget the ads, debates and endorsements.

A strong field operation, key in any major campaign, is all the more critical given the odd timing of the Massachusetts primary in early December and the fact that there are no other races on the ballot.

Come Tuesday, the only thing that matters for the candidates vying for the late Edward Kennedy’s Senate seat is getting more of their voters to the polls than anyone else.

“We’ve never had a statewide special election. And it’s in the winter, and now I’m hearing about snow. And it’s coming during the holiday season,” he said.

“This is a very unusual situation,” said Secretary of State William Galvin, who predicted voter turnout could be as low as 300,000 to 500,000.

Coakley, hoping to become the first woman elected from Massachusetts to the U.S. Senate, has drawn backing from female lawmakers and activists, from state Senate President Therese Murray to Ms. magazine founder Gloria Steinem to the pro-abortion rights group EMILY’s List.

Each of the four Democratic candidates - Attorney General Martha Coakley, U.S. Rep. Michael Capuano, Boston Celtics co-owner Stephen Pagliuca and City Year co-founder Alan Khazei - are playing to their strengths heading into the campaign’s final 48 hours as they try to sew up their party’s nomination.

Like the other candidates, Coakley is taking to the road in the final days and ramping up her get-out-the-vote drive.

Coakley, leading in most polls, says she’s not trying to take advantage of her position as the only female candidate, but a strong showing from female voters could prove critical on Tuesday.

“We’re taking no vote for granted,” Welford said.

Coakley spokesman Corey Welford said the campaign has spent months identifying voters and is planning on making thousands of phone calls to remind supporters to head to the polls.

In 1998, Capuano was a five-term mayor of Somerville when he jumped into an open race for the Congressional district that gave Massachusetts Tip O’Neill and John F. Kennedy. Then-Rep. Joseph P. Kennedy II had decided not to seek re-election.

Capuano knows the benefits of a strong field operation.

Capuano, who has portrayed himself as the working class underdog in the race, is hoping to repeat that kind of upset on Tuesday.

In a 10-way race that included a couple of millionaire candidates and former Boston Mayor Ray Flynn, Capuano was able to use his base of support in Somerville to capture 24 percent of the primary vote - enough to win the Democratic nomination, and eventually the seat in Congress.

Pagliuca, a multimillionaire, has spent millions of his own money to flood television, radio and Web sites with ads as he tries to overcome a name recognition gap compared to Coakley and Capuano.

“We’ve been steadily reaching out and identifying our voters and will be continuing to phone bank through the weekend and on Election Day,” said campaign spokeswoman Alison Mills.

O’Malley said the campaign is relying on “tried and true” methods like phone banks and bus tours, as well as new media techniques to help get supporters to the polls.

The political newcomer’s campaign has been collecting names of supporters and has also been going door-to-door to urge people to vote Tuesday, according to campaign aide Matt O’Malley.

Khazei, who’s spent his adult life helping build the nonprofit service organization City Year, is courting the same young voters and first-time voters that helped propel both Gov. Deval Patrick and President Barack Obama into office.

“Steve’s not a politician and I think that’s playing very much in our favor,” O’Malley said. “We’re really excited. Our momentum is really building.”

“We have a massive get-out-the-vote drive,” said Khazei spokesman Dave Jacobson.

Getting those voters to the polls could be a challenge, and Khazei’s campaign is using old and new techniques to rally support - from knocking on doors to posting on social media sites like Facebook and Twitter.

State Sen. Scott Brown of Wrentham and Duxbury attorney Jack E. Robinson are competing for the Republican nomination.

The campaign hopes to knock on 50,000 doors in the final few days of the campaign. It also has phone banks going day and night to contact both undecided voters and supporters to remind them to make it to the polls.

The two meet for their final forum on Monday evening on WGBH’s Greater Boston with Emily Rooney.

Brown has the endorsements of virtually every major GOP figure in the state and is considered the front-runner against Robinson, who has run and lost three prior campaigns.

Kennedy died Aug. 25 of brain cancer after nearly 47 years in the U.S. Senate. The primary is Tuesday, and the special election is Jan. 19.