In a September 1998 Larry King Live interview, President Hinckley was asked about polygamy:

Larry King: “You condemn it [polygamy]?”

Hinckley: “I condemn it. Yes, as a practice, because I think it is not doctrinal.”

Contrary to President Hinckley’s statement, we still have Doctrine & Covenants 132 in our canonized scriptures. We're also still practicing plural marriage in the Temples by permitting men to be sealed to more than one woman (so long as only one is living). Apostles Elder Oaks, Elder Perry, and Elder Nelson are modern examples of LDS polygamists in that they're sealed to multiple women.

Polygamy is doctrinal. Polygamy is not doctrinal. Yesterday's doctrine is today's false doctrine. Yesterday's prophets are today's heretics.