In a televised interview, PA Governor Tom Corbett, compared marriage equality to incest.

Corbett, a 64-year-old first-term Republican, is defending Pennsylvania’s ban on same-sex unions. During an interview that aired today on WHP-TV in Harrisburg, Corbett was asked his opinion about state lawyers arguing that marriage between members of the same gender should be illegal just as marriage between children is.

“I think a much better analogy would have been brother and sister, don’t you?” he said, according to a YouTube clip distributed to the media by the Pennsylvania Democratic Party.

Corbett is facing a re-election bid in 2014. Only one in five registered voters said Corbett deserves re-election, according to a poll released Aug. 28 by Franklin & Marshall College in Lancaster.

Since  Bloomberg Businessweek reported on the story, Governor Corbett has apologized for comparing marriage equality to incest.

Read about the Governor's apology at NBCNEWS.com.