A new poll released Tuesday found a slight decline in support for gay marriage among Minnesotans.

Lawmakers approved and Governor Mark Dayton signed a bill legalizing such unions nearly a year ago and the first gay couples tied the knot on August 1.

A KSTP/SurveyUSA poll published last April showed majority (51%) support for allowing gay couples to marry, with 47 percent opposed.

According to the latest poll, support has dropped 4 points to 47 percent. Opposition fell from 47 to 45 percent.

“This issue has not gone away,” Larry Jacobs of the University of Minnesota Humphrey Institute told KSTP. “Voters may have a verdict to make come November.”

Pollsters recorded slight decreases in support among Democrats (down 1% from 66%), Republicans (down 2% from 27%) and independents (down 6% from 53%).

Democratic Senator Scott Dibble, who authored and championed the bill in the Senate, said he doubted the issue would have an impact in November.

“I think the only people who are going to be worried about this on Election Day would never have voted for people who supported this measure in the first place,” Dibble told KSTP.