Donald J. Trump is continuing to beat the drum against U.S. Supreme Court Chief Justice John Roberts, who is likely to show needed restraint. I trust he’ll let the president continue his infantile tirade on matters on which he knows next to nothing.

Trump called some U.S. troops stationed overseas and continued his tirade over criticism the chief justice made about the president’s reference to an “Obama judge.” He sought to inform the president that that federal judges are “independent” and not partisan. That, of course, fell on Trump’s deaf ears.

So, then this happened: U.S. Senate Judiciary Committee Chairman Chuck Grassley defended Trump, saying that Roberts didn’t criticize President Obama when the president in 2010 “attacked” Justice Samuel Alito during a State of the Union speech.

Good job, Mr. Chairman, except you got quite wrong.

President Obama didn’t “attack” Alito; he criticized the Supreme Court’s decision on the Citizens United case that opened up campaign finance to corporations, allowing them to spend unlimited amounts of money on political races. He stated his view that the torrent of money would further corrupt the U.S. political system.

Justice Alito famously shook his head while sitting in front of the president and muttered “not true.” Obama, I repeat, did not single any justice out . . . which is quite different from what Trump has done with the chief justice.

To be fair, Obama was wrong to criticize the court in that setting. Most of the justices were sitting in a group in the audience on Capitol Hill. Democrats in the chamber cheered the president; the justices had to take it. I said at the time — and I’ll repeat it here — that President Obama’s criticism was done in the wrong place and in the wrong setting.

There is no equivalence to be found in what Donald Trump is doing now and what Barack Obama did then. As Chief Justice Roberts, I hope he’s done commenting on this ridiculous spat that the president initiated with his ill-informed and ill-tempered remark about an “Obama judge.”