“Faith & Freedom monitors voters’ databases to see which of the people they have interacted with vote early,” Lance Lemmonds, the communications director of the coalition told The Christian Post. “For those that haven’t voted early, the organization will send out about 28 million digital ads encouraging them to vote in the last weekend and Monday.” The coalition, he added, “will inundate Christian conservative voters in the last weekend. We will send those ads directly to their cellphones.”

The Faith & Freedom Coalition and the Family Research Council have also teamed up with United in Purpose, a data-mining operation that seeks to “transform culture” in “what some people call the seven mountains,” according to the president of United in Purpose, Bill Dallas. According to a 2012 article on NPR’s website, the organization assigns citizens points for certain characteristics, such as membership on anti-abortion lists or an interest in Nascar. If a voter’s score “totaled over 600 points,” Mr. Dallas said, “we run that person against the voter registration database.” If not registered, “that became one of the key people we were going to target.”

In a 2016 interview on Daystar TV, Mr. Dallas was even clearer: “We have a ministry consultant who will work with each church to help them get their people out to vote on Election Day.”

It would be inaccurate to assume that Christian nationalists are targeting only white evangelicals. Conservative Catholics are very much part of the focus, as are nonwhite evangelicals. Latino pastors and churches are targeted with messages about abortion, “religious freedom” and economic self-sufficiency.

“Maybe because you believe that when American Democrats offer you free stuff they care about you?” said the Spanish-speaking narrator of a Prager University video that aired at an event for dozens of Latino pastors in the San Diego area last month. The event, held at the Ocean View Church, was organized by Alianza de Pastores Unidos de San Diego, a regional affiliate of Church United. “Let’s be honest,” the narrator said. “You didn’t come to the U.S. for free stuff; you came here for the opportunity that allows you to work and earn money.”

At the same event, a businessman named Craig Huey, speaking through a translator, told the assembled pastors: “You need to be able to explain to your fellowship these issues. When we talk about abortion, for example, what is more important, talking about the minimum wage or about life?” Mr. Huey volunteered to host election forums at the pastors’ churches. “You don’t have to worry about it,” he said. “We can do it for you. And if you want to do it, we have a PowerPoint that you can use to go straight down the ballot. It’s not Republican, it’s not Democrat. But where do they stand on abortion?”

Leaders of the Christian nationalist movement appear to be aware that their political activity may raise questions about their compliance with the legal and tax guidelines intended to prevent churches from engaging in direct campaigning for political candidates and parties. At the Unionville pastor briefing, Tami Fitzgerald instructed pastors on how to thread the needle: “I’m telling you, you can talk about issues all day long as a pastor, you can tell people who you’re going to vote for,” she said. But “you must not publish that information in a church newsletter or state it from the pulpit.”