TOPEKA — Republicans meeting at their national convention in Cleveland this week adopted what some are calling the most conservative platform in Republican Party history.

In fact, one of the people calling it that is Kansas Secretary of State Kris Kobach who played a significant role in drafting many of its statements.

“Yes, I absolutely believe that to be the case,” Kobach said in a telephone interview from the convention Monday.

Kobach was chosen by Kansas Republicans to be one of the state’s 40 delegates to the convention, and one of nine who are pledged to support presumptive nominee Donald Trump for president. And last week, before the full convention began, he spoke to the party’s Platform Committee urging adoption of statements on issues ranging from immigration and gun rights to abortion and same-sex marriage.

That platform endorses Trump’s campaign pledge to build a wall along the 2,000-mile U.S.-Mexico border; opposes any effort to restrict ownership of any type of guns or ammunition; opposes the use of federal money to fund Planned Parenthood or similar organizations; and expressly condemns the recent U.S. Supreme Court decision legalizing same-sex marriage nationwide.

“I was involved in drafting language that criticizes the Obergefell decision (legalizing same-sex marriage) and the flimsy reasoning of the Obergefell decision,” Kobach said.

According to recent polling data, many of those positions put the party directly at odds with rapidly changing public opinion, particularly on the issue of marriage equality. But Kobach made no apologies about that.

“I would compare it to the life issue, the abortion issue,” Kobach said. “The Republican Party, after Roe vs. Wade (in 1973) took a stand and said we think the decision is wrong, and we think that the Supreme Court made a mistake, and we think the laws on this subject are still open to debate. And the party began persuading the public … and public opinion has shifted. Now, for the first time, since Roe v. Wade, you have the majority of Americans stating that they are pro-life.”

But recent polling data on abortion is far from conclusive. A CNN/ORC International poll conducted in March showed 78 percent of those surveyed believe abortion should be legal at least some of the time. And in a separate poll by Suffolk University and USA Today in December, a sizeable majority, 58 percent, said they opposed defunding Planned Parenthood.

On the issue of marriage equality, a CBS News poll last month found 57 percent of those surveyed saying it should be legal for same-sex couples to marry, although a majority of Republicans in the survey disagreed.

Most recently, a CBS News/New York Times poll earlier this month showed 57 percent of voters overall oppose building a wall along the Mexican border, although 73 percent of Trump voters support the idea.

The GOP platform, and Kobach’s involvement in drafting it, has prompted a predictable level of outrage on the editorial page of the New York Times, which condemned the platform Monday under the headline, “Kansas Zealot Helps Shape the G.O.P.’s Right-Wing Platform.”

It’s the kind of criticism Kobach says he’s grown accustomed to, and which bothers him not at all.

“Generally, if the New York Times editorial page disagrees with what I’m doing, then I think I’m probably doing the right thing,” he said.