Donald Trump on Friday attacked the Supreme Court majority that ruled against him in a landmark decision on tariffs with a venom and ferocity he has never directed against America’s foreign enemies. He suggested they were disloyal to the country, under the sway of other nations. The entire performance was unhinged, an old man’s tantrum about an affront to his manhood. He called the three Republican appointed justices who voted against him “fools and lapdogs.”

Just imagine him using that kind of language about, say, a war criminal like Vladimir Putin.

The president seemed to miss the entire point of the Supreme Court ruling—that the power to levy tariffs lay with the Congress—as well as the nuance in the majority opinion, such as a footnote by Chief Justice John Roberts that suggested while there were may be other ways by which he could seek to put tariffs in place, those “contain various combinations of procedural prerequisites, required agency determinations and limits on the duration, amount and scope of the tariffs they authorize.”

In other words, he could not behave like a king. He could no longer go around the world threatening other leaders whenever it suited him. He could no longer ignore the law, existing U.S. treaties, or the role Congress is assigned by the Constitution. He said he could—he said he didn’t need Congress to impose the new types of tariffs he mentioned during his press conference. But that was either denial or ignorance or a special Trumpian combination of both.

Because it will be very difficult for Trump to recreate the tariffs of the past year. Should he attempt to put some in place, and should he get the Congress and government agencies to work with him on this, the process is going........

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