Voters in Minnesota are divided on a proposed constitutional amendment which would define marriage as a heterosexual union.

According to a Public Policy Polling survey released Friday, 48 percent of voters support the amendment while 44 percent are opposed. Eight percent said they were not sure.

However, a large majority (71%) of respondents said the relationships of gay and lesbian couples should be recognized with either marriage (37%) or civil unions (34%). Twenty-seven percent said there should be no legal recognition of a gay couple's relationship.

Unlike North Carolina's proposed amendment, Minnesota voters are only being asked to vote on the definition of marriage. That is, the amendment would not bar the state from enacting gay-inclusive civil union legislation.

The issue in Minnesota – as in most of the country – breaks down along political and generational lines.

Voters under the age of 65 oppose the amendment, but a majority (58%) of seniors support it. And a large majority of Republicans (74%) favor the amendment, while only 23 percent of Democrats agree. Independents are evenly split at 50 percent.