"I've had people come and talk to me about how they were discriminated against," Corbett told the Inquirer. "The federal government has antidiscrimination laws. I believed they covered it."
Corbett cautioned that his decision did not change his definition of marriage as only between one man and one woman.
"My position hasn't changed," on same-sex marriage, Corbett said. "I understand other people's positions. I believe marriage is one man and one woman. But we'll let the court look at it."
Throughout the year Corbett has been facing tough reelection prospects. A Quinnipiac University poll in April found that 50 percent of Pennsylvania voters believed Corbett did not deserve reelection.