What’s Next in Trump’s Immunity Case

The justices heard arguments in the immunity case at a special session, the day after what had been the last scheduled argument of its term. Arguments heard in late April almost always yield decisions near the end of the court’s term, in late June or early July.

But a ruling in early summer, even if it categorically rejected Mr. Trump’s position, would make it hard to complete his trial before the election. Should Mr. Trump win at the polls, there is every reason to think he would scuttle the prosecution.

In cases that directly affected elections — in which the mechanisms of voting were at issue — the court has sometimes acted with unusual speed.

In 2000, in Bush v. Gore, the court issued its decision handing the presidency to George W. Bush the day after the justices heard arguments.

In a recent case concerning Mr. Trump’s eligibility to appear on Colorado’s primary ballot, the justices moved more slowly, but still at a relatively brisk pace. The court granted Mr. Trump’s petition seeking review just two days after he filed it, scheduled arguments for about a month later and issued its decision in his favor about a month after that.

In United States v. Nixon, the 1974 decision that ordered President Richard M. Nixon to comply with a subpoena for audiotapes of conversations with aides in the White House, the court also moved quickly, granting the special prosecutor’s request to bypass the appeals court a week after it was filed.

The court heard arguments about five weeks later — compared with some eight weeks in Mr. Trump’s immunity case. It issued its decision 16 days after the argument, and the trial was not delayed.