The Post Office Lease differs from many of Mr. Trump’s other business arrangements. That’s because, in writing the contract, the federal and D.C. governments determined, in advance, that elected officials could play no role in this lease arrangement. The contract language is clear: “No ... elected official of the Government of the United States ... shall be admitted to any share or part of this Lease, or to any benefit that may arise therefrom...”

The language could not be any more specific or clear. Donald Trump will breach the contract on Jan. 20, when, while continuing to benefit from the lease, he will become an “elected official of the Government of the United States.”