A majority of likely voters in Maine say they support equal marriage rights for gay and lesbian couples.

According to a new WBUR poll of 506 likely voters released Monday, fifty-five percent of respondents favor a November ballot question which, if approved, would legalize gay nuptials in the state.

Marriage equality supporters are returning the issue to the ballot box after voters in 2009 narrowly repealed a marriage law approved by lawmakers with a “people's veto,” known as Question 1. If approved, Maine would become the first state to legalize such unions with a popular vote.

(Related: Maine secretary of state releases draft of gay marriage question.)

While the poll is good news for marriage equality supporters, it suggests that, unlike in other states, President Barack Obama's recent endorsement of such unions has not influenced Mainers' thinking on the issue much.

A Public Polling Policy survey released in April before Obama made his historic endorsement also found a majority (58%) of Maine voters in support of marriage equality.

Additionally, groups working to defeat the measure have just begun their fundraising campaigns.

(Related: Maine churches fundraise against gay marriage on Father's Day.)