Monday brought good news for two of Donald Trump’s most hated enemies: the former FBI director James Comey, and the New York state attorney general, Letitia James. A federal judge dismissed the sham indictments the administration had obtained against them.

Judge Cameron McGowan Currie reminded the president and his attorney general of the great lessons of a society governed by the rule of law: how things are done matters as much as what is done. Without fair procedures, no one can be safe from the arbitrary exercise of government power.

This is never more apparent than when leaders target their political opponents and seek revenge against those who do not fall in line. The US is learning this lesson in real time as the Trump administration politicizes prosecution.

Recall the president’s infamous 20 September direction to Pam Bondi, the US attorney general.

“Pam,” Trump posted to Truth Social, “I have reviewed over 30 statements and posts saying that, essentially, ‘same old story as the last time, all talk, no action. Nothing is being done. What about Comey, Adam ‘Shifty’ Schiff, Leticia??? They’re all guilty as hell, but nothing is going to be done.’

“Then,” he continued, “we almost put in a Democrat supported U.S. Attorney, in Virginia, with a really bad Republican past … I fired him, and there is a GREAT CASE, and many lawyers, and legal pundits, say so. Lindsey Halligan is a really good lawyer, and likes you, a lot.”

The president ended by making it clear what he wanted and why he wanted it. “We can’t delay any........

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