November 17, 2013 4:17 pm -

Mary Cheney and her partner, Heather Poe, are going after Wyoming U.S. Senate candidate Liz Cheney because of her comments denouncing gay marriage.

“Liz – this isn’t just an issue on which we disagree, you’re just wrong – and on the wrong side of history,” Mary Cheney, who is gay, wrote on her Facebook page.

Ms. Poe’s comments were sharper and more personal. “Liz has been a guest in our home, has spent time and shared holidays with our children, and when Mary and I got married in 2012 – she didn’t hesitate to tell us how happy she was for us,” Ms. Poe wrote on her own Facebook page. “To have her say she doesn’t support our right to marry is offensive to say the least.”

Appearing on “Fox News Sunday,” Liz Cheney, who is challenging Senator Mike Enzi in next year’s primary, said she and her younger sister had parted ways on whether gay men and lesbians should have the right to marry. “This is just an area where we disagree,” Liz Cheney said.