President Donald Trump ranted about the Supreme Court over the weekend, specifically calling out two of his own appointees for ruling against him in a recent tariff dispute.

Chief Justice John Roberts on Tuesday pushed back on personal attacks against judges, calling them “dangerous” and a “problem.”

“You get used to the criticism right away,” he said. “And it can very much be healthy. We don’t believe that we are flawless in any way. It’s important that our decisions are subjected to scrutiny, an...