Nowhere was that clearer than in the joint speech of the St. Louis couple who were seen in a Twitter clip standing in front of their house, brandishing guns against a Black Lives Matter march. They pointed out that the BLM people were undisturbed by the cops, while they found themselves under arrest.

Their message — this could happen to you, homeowners — surely struck a chord with Americans who own guns as protection. Stats tell us that 43 percent of all Americans live in a gun-owning household.

That’s a lot of people. Trump’s hope for re-election is based on getting those people to turn out in greater numbers than they did in 2016, to offset Democratic gains. And the Democratic message — that cops are bad and rioters are good — plays right into Trump’s hands.

The Democrats also may have done Trump a favor in spending four days last week talking about America’s supposed grave sins — structural racism, polluting, and the like. Speaker after speaker last night hammered them with tried-and-true Republican patriotism.