Opposition to gay marriage in Kentucky has dropped 22 percentage points since voters approved a constitutional amendment banning such unions in 2004.

According to a Bluegrass Poll released this week, 37 percent of voters surveyed support allowing gay and lesbian couples to marry, while 50 percent remain opposed.

Seventy-two percent of voters in 2004 voted in favor of a constitutional amendment defining marriage as a heterosexual union.

Responding to the poll, Chris Hartman, director of the Fairness Campaign, said Kentucky has hit “a bit of a threshold,” adding that a tipping point “is soon to follow.”

“The opposition has been teetering on the edge of having a majority for a long time, and that ground is rapidly slipping out from under them,” he said.

Martin Cothran with the Family Foundation disagreed.

“I think the movement is not going to continue at the same pace,” he told The Courier-Journal. “I think what you are seeing now is a reshuffling of public opinion on this because people are sort of in the gray area and are not committed to one side or the other.”

A federal lawsuit challenging the state's ban is currently before the Sixth Circuit Court of Appeals in Cincinnati, which will hear arguments next week.

(Related: Opponents call for 4 days of prayer to ask 6th Circuit to uphold marriage bans in 4 states.)