On Thursday, one of Iowa's most influential social conservative organizations, The Family Leader, informed GOP presidential candidates that to win the group's endorsement, they'll have to sign a pledge. Family Leader president Bob Vander Plaats, a former Mike Huckabee ally, wants GOP contenders to commit to a list of 14 red-meat items, including opposition to gay marriage, a ban on Islamic Sharia law, a rejection of pornography, and an affirmation that married couples have better sex.