A seemingly casual greeting to the former president of the United States set social media abuzz Thursday when a judge presiding over the arraignment for former President Donald Trump referred to him as “Mr. Trump.”

Trump pleaded not guilty in federal court in Washington, D.C., to all four federal charges stemming from Special Counsel Jack Smith’s investigation into 2020 election interference and the Capitol riot of Jan. 6, 2021.

U.S. Magistrate Judge Moxila Upadhaya presided over Thursday’s proceedings, and reporters and onlookers highlighted how she referred to the former president as “Mr. Trump.”