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(NECN: Amy Sinclair) - One of the key races to watch in Maine on Tuesday will be Question 1, which asks voters if they want to allow the state to issue marriage licenses to same-sex couples.
It’s a divisive issue that's shaping up to be a very tight race.
Opponents of gay marriage spent the lunch hour on Monday waving signs on the bridge that spans Lewiston and Auburn, Maine, a French catholic stronghold.
In Portland, hundreds of gay marriage supporters worked the phones, asking Mainers to vote “yes” on Question 1.
Both campaigns agree that their get-out-and-vote push is critical in this tight race.
The most recent survey conducted by the Maine People's Resource Center showed 50.5 percent of voters saying yes to marriage licenses for same-sex couples, with 46.5 percent saying no and 2.9 percent undecided.
But when it comes to the gay marriage question, polling is often inaccurate. In 2009, all the polls showed gay marriage ahead, but when the votes were counted, it lost by six percentage points.
Which is why Carroll Conley, co-chair of Protect Marriage Maine, said he's optimistic.
“We’re actually in a better position now that we made a 14-point swing,” Conley said.
But the spokesman for Mainers United for Marriage said they've spent the last two years persuading the opposition to reconsider.
“Our campaign has had 250,000 one-on-one conversations with Maine voters,” said spokesman David Farmer. “We've seen that they're changing their minds."
Now the nation will be watching to see if Maine makes history as the first state to approve same-sex marriage by popular vote, or repeats history by saying no for the second time in just three years.