Why Trump’s FBI investigation could now be delayed for months or even years

Judge Aileen Cannon’s order suspending one of the Justice Department’s criminal investigations into former President Donald Trump, at least until a court-appointed official can review documents the FBI seized from Trump, is a trainwreck of judicial reasoning. Cannon mangles the law so completely that it’s hard to know where to even begin in criticizing her opinion in Trump v. United States.

For starters, Cannon, who was appointed to the federal bench by Trump days after he lost the 2020 election, argues fairly explicitly that Trump is entitled to special rules that apply to virtually...