Four Republican presidential candidates are set to appear at a forum in Iowa tonight hosted by one of the state’s best known political organizers: Bob Vander Plaats. Vander Plaats’ group, The Family Leader, along with the National Organization for Marriage, is hosting Mike Huckabee, Rick Santorum, Rick Perry and Bobby Jindal for a “family leadership regional summit.”

It’s no surprise that the candidates are courting Vander Plaats: He is widely seen as the organizing powerhouse behind Huckabee and Santorum’s successful 2008 and 2012 Iowa caucus campaigns. It’s even less surprising that Republican candidates are seeking to ingratiate themselves to one of the country’s most radical Religious Right activists.

Vander Plaats, although he has been unsuccessful in his own three attempts to win the Republican gubernatorial nomination, has put together a political coalition in Iowa that, along with carrying Huckabee and Santorum to caucus victories, helped to oust three state supreme court judges who had ruled in favor of marriage equality in the 2010 election. While a similar attempt two years later was unsuccessful, Vander Plaats has nonetheless become a major force in the state’s conservative movement.

5) Slavery Rhetoric

Warning Republicans not to “abandon their base” by softening their opposition to gay rights, Vander Plaats insists that fighting same-sex marriage is not a losing issue for the GOP. He believes that Republicans should stand up and be proud of their refusal to support marriage equality, just as the party fought to curb slavery during its founding era.

“We actually stand for what God has designed because, just like with slavery, the truth is on our side,” Vander Plaats said last year in an interview with right-wing talk show host Steve Deace. “We can win this battle.”

He told another outlet that Republicans shouldn’t even take the position that the states should decide their own marriage laws since same-sex marriage, like slavery, is unequivocally immoral: “You don’t leave slavery up to the states, nor should you. It’s either right or it’s wrong.” In a speech in 2012, Vander Plaats said that a court ruling in favor of marriage equality should be viewed as judicial overreach on the level of Dred Scott.

During the last presidential primary season, Vander Plaats tried to get Republican candidates to sign a pledge that, among other questionable provisions, suggested that African-American families were more stable under slavery than they are today.

4) Conspiracy Theories

In Vander Plaats’ world, the right to speak freely about “faithful heterosexual monogamy” is under attack, “Sharia Islam” is a menace in American politics and President Obama’s birth certificate is missing. (Vander Plaats has praised Donald Trump’s quixotic birther crusade as “bold.”)

Perhaps no issue has Vander Plaats more concerned than gay marriage, which he has called a grave threat to liberty and a Satanic plot. One video his group produced showed images of terrorist attacks and shootings alongside stories about same-sex couples’ weddings and gay members of the Boy Scouts to make a point about the “darkness” sweeping America

3) Gay Marriage Predictions

In his campaigns against marriage equality, Vander Plaats has done whatever it takes to scare voters about the dire consequences of gay rights. He warned that the legalization of same-sex marriage would lead to “tyranny” and sanction “a parent marrying their child.”

He defended his group’s comparison of homosexuality to second-hand smoke by explaining that both represent “a public health risk,” adding: “If we’re teaching the kids, ‘don’t smoke, because that’s a risky health style,’ the same can be true of the homosexual lifestyle.”

Vander Plaats also took the time to criticize an Iowa anti-bullying conference that focused on the targeting of LGBT youth, saying that the state should instead be promoting abstinence-only summits.

2) Crush on Putin

Vander Plaats may still be weighing which Republican candidate to endorse this year, but he has already thrown his support behind one foreign leader: Russian President Vladimir Putin. When Putin signed a law that effectively bans speech in support of gay rights, Vander Plaats praised the Russian president for saying “you know what, don’t bring this homosexual propaganda into my country.”

He said that Putin now encapsulates the traditionally American values of “military might, decisive action, core values, morality, beliefs.”

“He’s taken what used to be our strengths, which has now defaulted into our weaknesses because of Barack Obama, no leadership, and he’s making them his strengths and he’s emerging now on the world stage as a newly discovered leader,” Vander Plaats said back in 2013.

1) No Separation of Church and State

While Vander Plaats’ prediction about gay marriage ushering in adult-child marriage has come true in exactly zero of the dozens of states with marriage equality, he was prophetic in one respect: Vander Plaats advocated for governors to ignore court rulings on the marriage question well before it became a widespread sentiment among conservatives.

Vander Plaats insists that a governor can simply set aside any ruling that violates his or her reading of the Bible, insisting that if a judge legalizes marriage equality in a state, the state’s governor should simply issue an executive order “that places a stay on the judge’s decision” since it “goes against the law of nature and the law of nature’s God, which means, it’s against the Constitution.”

Vander Plaats believes that the U.S. government must fall under God’s jurisdiction and follow “God’s principles and precepts,” not just on social issues like marriage but also in economic and foreign policies.

“If you believe what you say you believe, that marriage is foundational and it’s between a man and a woman, which is what He says he believes, then you got to stand up for that, because that’s the law of nature, that’s the law of nature’s God, that’s the Declaration of Independence, which this whole country was founded on,” he said last year.

Vander Plaats specifically pointed to the Supreme Court’s recent ruling striking down part of the Defense of Marriage Act, calling it a travesty that created a “constitutional crisis” by “defying the law of nature and the law of nature’s God” and “going against the document that predates the Constitution.”