Broadly speaking, Trump’s focus on borders is the linchpin of his presidency and the essence of putting Americans first. His commitment, which has ebbed at times, was always popular with his core supporters, but the appeal is spreading because of the unrelenting surge of illegal crossers and the Dems’ rigid opposition to any ­measure that could stop it.

More than 100,000 people were apprehended in June and officials say many more crossed undetected. No rational American can say the situation is acceptable, yet even Friday, Ocasio-Cortez was still calling it a “manufactured” ­crisis.

Similarly, the widespread hysteria over the planned roundup of those with outstanding deportation orders is bizarre. If deportation orders are meaningless, why bother with the expense and trouble of having a border at all?

Incredible as it seems, an America without borders appears to be where the left is going, with AOC the latest to say that Homeland Security should be eliminated. If she knows, she doesn’t care that the creation of the Cabinet-level department was in reaction to the horrors of 9/11. The measure passed the House with 68 percent of the vote and got 90 votes in the Senate, with Joe Biden and Hillary Clinton among those voting aye.