The National Organization for Marriage (NOM) tapped Republican Rep. Steve King to spearhead its efforts in Iowa to repeal gay marriage, the Des Moines Register reported.

In internal memos unsealed last month in the course of NOM's ongoing legal challenge to Maine's campaign reporting laws, the group mentions King's name repeatedly, saying he would “lay out a plan.”

The group wrote in connection with Iowa and New Hampshire: “We expect to force presidential contenders to deal with the issue, and since we know these are generally pro-marriage states, we anticipate pro-marriage candidates to do well and thus influence the U.S. presidential races in 2012.”

The paper noted that NOM President Brian Brown said with a hint of sarcasm: “The mask is off. We want to elect a president who believes marriage is a union of a man and a woman.”

Brown added that King “has been a tremendous voice for marriage.”

King joined NOM in 2010 on its anti-gay marriage bus tour and has spoken out frequently on the issue, once saying, “Unicorns, leprechauns, gay marriages in Iowa – these are things you will never find because they don't exist.”

He also organized last year's Conservative Principles Conference, which was co-sponsored by NOM and featured Minnesota Rep. Michele Bachmann, South Carolina Senator Jim DeMint and presidential hopeful Rick Santorum, all of whom oppose marriage equality.

The group has drawn heavy criticism for other memos which detail a strategy to pit minorities against supporters of gay marriage.

(Related: Maggie Gallagher defends anti-gay marriage group's race-baiting strategy.)