Bob Vander Plaats, head of Iowa-based The Family Leader, has warned that gay marriage and abortion will lead to God ending his blessing on the United States.

The Family Leader, the state's most vociferous opponent of marriage equality, received national attention in 2012 when Rick Santorum accused the group of indirectly asking to be paid for an endorsement of his presidential campaign.

(Related: Rick Santorum, gay marriage foe NOM accused of paying for conservative endorsement.)

“When people say to me: 'How can it be that in this generation we can have $17 trillion dollars in debt ready to pass on to the next generation?' Well, when you abort 55 million babies, when you undermine the family and marriage – God's first institution – and you say it can be anything you want it to be. When you trample on religious liberty in the Constitution. $17 trillion dollars, like now you're just talking money,” Vander Plaats told the audience.

“You cannot run away from the heart of God and expect God to bless the country,” he added.

Iowa is one of the 17 states, plus the District of Columbia, where gay couples can marry.