Opponents of gay marriage and gay rights will be featured at Iowa Representative Steve King's Conservative Principles Conference, the Iowa Independent reported.

King, an ardent opponent of gay rights, will host the March 26 conference at the Des Moines Marriott.

“Iowans will be granted access to some of the best, most respected conservative leaders in our nation at my conference,” King said in a statement.

Expected to attend are four potential GOP presidential candidates: Minnesota Congresswoman Michele Bachmann, former Pennsylvania Senator Rick Santorum, Tea Party favorite Herman Cain and former American diplomat and Fox News commentator John Bolton.

South Carolina Senator Jim DeMint will keynote the event. Last year, DeMint told a group of conservatives that schools should reject gay and lesbian teachers.

Also invited is the National Organization for Marriage (NOM), the nation's most vociferous opponent of gay marriage.

King joined NOM last summer in campaigning against three of the seven Iowa Supreme Court justices who legalized gay marriage in the state.

In a recent interview with Political Correction, the 61-year-old Republican crowed about taking on gay marriage supporters greeting him on the bus tour.

“I went on the judge bus tour with the National Organization for Marriage and the Family Research Council, and I climbed off of that bus into the heart of the screaming, profane gays that met us at nearly every stop, and I took them on directly, and in some cases actually — not direct violence, but physical,” he said.