Chief Justice John Roberts is on a collision course with Donald Trump as the president increasingly tests the limits of the judiciary’s role as the most prominent backstop to his administration’s sweeping agenda.

The president stepped up his attacks this week by calling for a judge’s impeachment, earning a rare public rebuke from the chief justice.

Though it marked the most direct spat yet between the duo since Trump retook the White House, the trail ahead appears rougher as the ever-intensifying barrage of litigation against the Trump administration creeps closer to the Supreme Court.

“If Justice Roberts and the United States Supreme Court do not fix this toxic and unprecedented situation IMMEDIATELY, our Country is in very serious trouble!" Trump wrote on Truth Social Thursday.

As the president expresses agitation toward district judges who block his policies nationwide, Trump so far has maintained more cordiality with Roberts, refusing to attack him personally.

“The president respects Chief Justice Roberts overall, he just expressed that to me in the Oval Office,” White House press secretary Karoline Leavitt told reporters Wednesday.

The restraint was notable, given that Trump has no trepidation for lambasting judges who rule against him. Yet he refused to personally chastise Roberts, who had just rebuked the president for calling for the impeachment of U.S. District Judge James Boasberg for ordering the administration to turn around deportation flights last weekend.

The chief justice’s pushback was terse, two sentences in all.

“For more than two centuries, it has been established that impeachment is not an appropriate response to disagreement concerning a judicial decision. The normal appellate review process exists for that purpose,” Roberts wrote.

Retired Supreme Court Justice Stephen Breyer, who served alongside Roberts for nearly 17 years, said on CNN this week that “every judge is........

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