Details of IRS audits are not public and the merits of each side's arguments are impossible to tell. But the way the president's case against his own government's IRS was resolved is highly unusual, experts say.

President Donald Trump has been feuding with the IRS for many years over audits into whether he and his business empire paid enough taxes.

A new settlement term bars the IRS from investigating President Trump, his family, and businesses for past tax issues. This extraordinary addition to a $10 billion lawsuit…