NASHUA, N.H. - Republican Mike Huckabee said Friday that marriage shouldn’t be treated as an experiment in response to questions about whether Vice President Dick Cheney’s lesbian daughter should have the right to wed.

The former Arkansas governor, who is seeking the GOP presidential nomination, said heterosexual marriages face enough challenges without adding new configurations to the mix.

“Taking on a new definition doesn’t make sense right now,” Huckabee said in an interview with The Associated Press after speaking to business leaders in New Hampshire.

Mary Cheney, 37, announced in December that she and her partner of 15 years, Heather Poe, were starting a family. She has not said how the child was conceived. The baby is due in the spring and will be the vice president’s sixth grandchild.

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