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(NECN: Alison King) - The debates are done, months of campaigning nearly over. On Tuesday Massachusetts voters go to the polls to select the next U.S. Senator. Throughout the entire campaign, polls have shown Martha Coakley as the big front-runner. Can she be beat? Paul Watanabe: I don't see anything that occurred in those last three days... that is in some way going to place Martha Coakley in serious jeopardy. That is the commonly held assessment among those who have been following the democratic primary race to replace the late Senator Ted Kennedy. Attorney General Martha Coakley began the race in September as the front runner and none of her three democratic challengers -- all men, have been able to shake that lead. In fact, many have been surprised at how gentle they have been -- including Coakley's closest challenger, Michael Capuano. Capuano: Martha, I think you did a pretty decent job at some of these things, I've never criticized you on them, I think you did a pretty decent job. Even when the topic turned to the Patriot Act, Capuano was one of the few in the house to vote against it. The normally feisty congressman resisted the opportunity to score some points. Watanabe: He backed of so timidly, I thought that, in some ways he didn't want to seem to press that advantage. Contrast that with the battle that erupted between Capuano and businessman Steve Pagliuca. David Guarino: “I think Capuano's theory is that if he undercuts Pagliuca that that support may be soft because it's only generated through advertising - that he hasn't been on the public scene as long as Capuano has - so he may be able to gain enough in that short period without increasing his negatives by going after somebody like Martha Coakley who's popular.” Here's what the Democratic challengers to front runner Coakley have going for them in these final five days. Voter turnout on Tuesday is expected to be low and many voters are still thought to be undecided -- and just focusing in on the race.