BOSTON (AP) - With rallies and phone calls, e-mails and ads, supporters and opponents of three ballot questions made their final pitch to voters on the eve of Election Day.

Sen. John Kerry and his GOP challenger Jeff Beatty also wrapped up their campaigns with final appeals to Massachusetts voters, who will get a chance to cast ballots in the closely watched presidential race as well.

Voters will also decide four congressional races and dozens of statehouse contests on Tuesday.

Backers of Question One, which would eliminate the state income tax, asked supporters to hold signs outside polling locations, talk to neighbors and post videos online saying how they would spend the tax money they would save if the measure passed.

"Set your alarm for 6 a.m. (or close to that) and hold up signs during the morning. Then leave work early, and hold up signs in the evening. Dress warmly," Carla Howell, chairwoman of the Committee for Small Government, urged supporters in an e-mail.

Critics of the question manned a phone bank to contact voters and urge them to make it to the polls on Tuesday to kill the measure. The Coalition for Our Communities, which has raised more than $5 million in cash and contributions, the vast majority from unions, kept up a heavy advertising schedule on television, radio and the Internet.

Opponents also planned a "Unity Rally" at Roxbury College Monday evening to "celebrate the strength of our united community" and gear up for the final push on Election Day.

The Committee for Sensible Marijuana Policy, which supports the ballot question to decriminalize possession of a small amount of marijuana, replacing criminal penalties with a $100 civil fine, released a statement by more than 50 clergy members supporting the proposal.

"We're not urging anyone to use marijuana," the Rev. Marc Fredette from the First Unitarian Universalist Parish in Waltham, said in the written statement. "But it is worse to have a marijuana policy that doesn't accomplish any of its goals."

The Coalition for Safe Streets, led by the state's 11 district attorneys, released their own statements from Attorney General Martha Coakley and former Boston mayor and U.S. ambassador to the Vatican Ray Flynn urging voters to reject the measure.

"Those of us in the law enforcement community, and perhaps more importantly, those who work directly with children and teenagers, are gravely concerned about the impact any decriminalization will have on our youth," Coakley said in a statement.

A rematch between animal activists and the owners and workers at the state's two greyhound race track is also coming to an end. Eight years ago a similar ballot question to ban dog racing in Massachusetts was narrowly defeated. Tuesday's question would phase out dog racing by 2010.

Supporters, led by the Committee to Protect Dogs, rallied on Boston Common on Sunday to call attention to the proposal, which they say would help protect greyhounds from injuries.

Dog track owners stepped up an advertising campaign pointing out the cost to the state's economy if the tracks are shuttered. They said the question, if passed by voters, would cost 1,000 jobs.

Dog track owners also said the greyhounds are treated well and that they've stepped up greyhound adoption efforts.

In the race for the Senate, Beatty made a final sprint for votes as he tried to gathered enough support to oust longtime Democratic incumbent Kerry.

Beatty spent the morning greeting voters at South Station in Boston and switched to the Park Street MBTA station in the afternoon.

"After a year and a half on the campaign trail, it is hard to imagine that it comes down to one day. We need you all to continue to get the vote out, hold signs and cover polling stations," Beatty's campaign manager Joseph Manzoli, said in an e-mail to supporters.

Kerry planned to head to Hyannis Monday evening to join the Barnstable Democratic Town Committee's election evening rally.

Typically Sen. Edward Kennedy goes the rally, but this year Kennedy, who is battling a malignant brain tumor, was unable to attend and the committee asked Kerry to stop by. Kennedy returned to his home in Washington last week and is not expected back in the state until around Thanksgiving.