The message to energize Christian conservatives has twin purposes: to inspire them to celebrate their victories and to stoke enough grievance to prod them to vote.

But in a midterm election, no singular political enemy will emerge the way Hillary Clinton did in 2016. Instead, leaders of the movement plan to lean hard into a message that fans fears and grudges: that the progressive movement and national media mock Christian life and threaten everything religious conservatives have achieved in the 15 months of the Trump administration.

“Show the left that you can put labels on us, you can shame us. But we’re not giving up,” said Tony Perkins, the president of the Family Research Council, who explained that many conservatives of faith see attacks on Mr. Trump as an attack on their judgment.