As America prepares for November’s presidential election, the fight for votes will inevitably intensify.

But as conservative commentator Megan Basham explains in her new book, “Shepherds For Sale: How Evangelical Leaders Traded The Truth For A Leftist Agenda” (Broadside) — and in an interview with The Post — nowhere will the campaign be more fiercely fought than in the battle for the one of the most powerful voting blocs in the country: evangelicals.

A culture reporter for the Daily Wire and former editor at Evangelical publication World Magazine, Basham reveals in “Shepherds For Sale” how “progressive power brokers” are targeting not just churches but Christian media, universities and even entire denominations in a bid to force their hands when it comes to dealing with culture war flash-points like abortion, LGBTQ rights and climate change. //

“Look at nearly any issue that represents a key priority for progressives, and you will find that even when all other major demographics have signed on, Christians, and evangelicals in particular, represent the most formidable roadblock,” she says. //

Basham maintains that in return for toeing a more left-wing line on key issues — as well as reinterpreting or even eschewing scripture — many church leaders have received everything from praise to prestige, career progression to significant amounts of cash, selling out Christianity in the process.

“Evangelicals don’t always win at the ballot box, but in most regions of the country, they always present a massive hurdle to leftist power grabs,” writes Basham. //

A significant aspect of the left’s ability to infiltrate the Church is the existence of what Basham calls the “Eleventh Commandment,” namely: Thou shalt not criticize church leaders.

“What the Eleventh Commandment has meant in practice is that even as prominent pastors and theologians have spent the last few years accommodating every sort of secular, progressive influence, critical or even cautioning voices have been slow to respond [to the challenge],” she says.