EARLIER THIS MONTH, a group of professors from the normally stodgy world of tax law wrote to President Joe Biden calling on him to free the IRS contractor who leaked the tax returns of Donald Trump and thousands of millionaires and billionaires.

Charles Littlejohn’s five-year sentence was six times the recommended maximum, the professors said, despite the fact that Littlejohn’s disclosures helped shed light on a broken tax system that allows Warren Buffett to pay a lower tax rate than his secretary.

With Biden winding down his time in office, Littlejohn’s advocates, including tax code reformers from the groups Revolving Door Project and Patriotic Millionaires, are worried for the incarcerated IRS consultant. They’re calling on Biden to commute Littlejohn’s sentence before it is too late and he is forced to spend Trump’s second term in prison at risk of retribution.

“Trump has already promised to pardon January 6 insurrectionists who are convicted,” said Kenny Stancil, a senior researcher at the Revolving Door Project. “It would be a perversion of justice if they walk free while Littlejohn spends over four more years in prison.”