BOSTON -- The Democratic candidates for governor made a last pitch to voters Monday hours before polls were scheduled to open for the state primary.

NewsCenter 5's Janet Wu reported Monday that one thing seems clear -- unenrolled voters likely will decide the outcome.

According to the Secretary of State's office, 49.5 percent of the registered voters in Massachusetts are unenrolled, and can vote either Democrat or Republican on Tuesday.

Thirty seven percent are registered Democrats, and 12.7 percent are registered Republicans.

Candidate Chris Gabrieli's said that his strongest argument is the fact that Republican candidate Lt. Gov. Kerry Healey is attacking him before the primary.

"I think it's quite shocking that she is trying to tell Democratic and Independent voters how to vote in the Democratic primary. She'd rather run unopposed, I suppose," he said.

Polls showed that candidate Deval Patrick has the lead going into the primary.

"This isn't over until the voters say it's over. They won't say it's over until 8 p.m. Tuesday. So, we have to deliver," Patrick said.

"The expectations are so high for him with all these polls that you want to make sure that nobody gets too confident and stays home. On the other hand, he certainly looks like a winner, and people want to be with the winner," consultant Mary Ann Marsh said.

Tom Reilly, running third in the polls, said they are irrelevant to him.

"When I ran for attorney general, they took a poll the day of the election and at the end, when the polls closed, they told me I lost by 8. I won by 6," Reilly said.

At least one undecided voter said that she likes all three candidates, but said she'd probably vote for Patrick.

"I just like his openness. I just get this sense of honesty from him that I don't normally see from politicians," undecided voter Patricia Leahy said.