A majority of people attending the Minnesota State Fair say they oppose a proposed constitutional amendment that would define marriage as a heterosexual union, the Minnesota Independent reported.

The annual poll conducted by the Republican-led Minnesota House of Representatives found 66.5 percent of fair-goers oppose the amendment, while 29.8 percent favor it.

The “informal, unscientific survey of issues discussed in the prior sessions” asked: “Should the state constitution be amended to define marriage as only a union of one man and one woman? This question will be on the November 2012 ballot.”

A record 12,549 people participated in the survey during the fair's 12-day run, which ended on Labor Day.

Opponents and proponents of the measure encouraged supporters to participate in the poll. Minnesota for Marriage, which supports defining marriage as a heterosexual union in the Minnesota Constitution, and Minnesotans United for All Families, which opposes the amendment, alerted supporters of the survey via email and at various booths throughout the fairgrounds.

(Related: Minnesota for Marriage's state fair booth glitter bombed.)