A poll released last week found a majority of Wisconsin voters support allowing gay and lesbian couples to marry.

The latest Marquette University Law School poll of 804 registered voters shows 56 percent of respondents support repealing Wisconsin's constitutional amendment defining marriage as a heterosexual union, a 1 percent increase from a previous poll conducted in May. Thirty-seven percent of respondents said they remain opposed to marriage equality.

A federal judge in June struck down Wisconsin's ban, approved by voters in 2006. More than 500 couples married before the ruling was put on hold.

On Friday, the Seventh Circuit Court of Appeals in Chicago announced it would hear arguments in an appeal in the case on August 26. The court combined the case with a separate ruling striking down Indiana's ban and denied requests that the appeals be heard before the full court, instead of the customary 3-judge panel.

(Related: Gov. Scott Walker: GOP isn't fighting gay marriage.)