President Trump tried to give his latest attack on Mayor Bill de Blasio an aura of authority — but he may just have broken the law in the process.

While jetting on Air Force One to a political fundraising event, Trump tried to look presidential by sitting behind a desk as he blasted de Blasio as soft on crime and quick on taxes.

But look a bit closer and an ethics watchdog spots a big problem for Trump in the video. Over Trump’s left shoulder, affixed above a window, is the presidential seal.