That polygamist was not a Mormon. The Mormon church hasn’t sanctioned polygamy since the 19th century.
And the “Mitt was behind the Palin attacks” is a ridiculous lie.
Come on, stop it. Not true. (Stop the lawyerin'). Carmon Hardy's book shows dozens of behind-the-scenes LDS plural marriages between 1900-1910...So, sorry, that's later than "19th century."
Second, let's focus in on that word "sanction" -- I'd say calling polygamy in the future tense the term "the holy practice" is a considerable sanction, wouldn't you?
"Obviously, the holy practice [of polygamy] will commence again after the Second Coming of the Son of Man and the ushering in of the millennium." (LDS apostle Bruce R. McConkie, Mormon Doctrine, 1966, p. 578).