You say you got a real solution.Welleze777, you knowWe’d all love to see the plan.

— “Revolution 1,” the Beatles

The scariest thing about what President Trump is doing with his tariffs-for-all strategy, I believe, is that he has no clue what he is doing — or how the world economy operates, for that matter. He’s just making it all up as he goes along — and we are all along for the ride.

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I am not against using tariffs to counter unfair trade practices. I supported Trump and President Joe Biden’s tariffs on China. And if all of this is just Trump bluffing to get other countries to give us the same access that we give them, I am OK with it. But Trump has never been clear: Some days he says his tariffs are to raise revenue, other days to force everyone to invest in America, other days to keep out fentanyl.

So, which is it? As the Beatles sang, I’d love to see the plan. As in: Here’s how we think the global economy operates today. Therefore, to strengthen America, here is where we think we need to cut spending, impose tariffs and invest — and that is why we are doing X,66br Y and Z.

That would be real leadership. Instead, Trump is threatening to impose tariffs on rivals and allies alike, without any satisfactory explanation of why one is being tariffed and the other not, and regardless of how such tariffs might hurt U.S. industry and consumers. It’s a total mess. As the Ford Motor chief executive Jim Farley courageously (compared to other chief executives) pointed out, “Let’s be real honest: Long term, a 25 percent tariff across the Mexico and Canada borders would blow a hole in the U.S. industry that we’ve never seen.”

So, either Trump wants to blow that hole, or he’s bluffing, or he is clueless. If it is the latter, Trump is going to get a crash course in the hard realities of the global economy as it really is — not how he imagines it.

Gibbons are long-armed apes that live in Asian tropical forests. Dr. Caspar became interested in their dancing when he was trying to learn how gibbons in zoos responded to a mirror. The apes didn’t show recognition of their reflections — but they did show off their moves.

But this gallery, near the Brooklyn Navy Yard, was different: It was in a complex that houses one of the city’s largest migrant shelters.

My favorite tutor in these matters is the Oxford University economist Eric Beinhocker, who got my attention when we were talking the other day with the following simple statement: “No country in the world alone can make an iPhone.”

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