A three-judge panel of the U.S. Court of Appeals for the Second Circuit considered the significance of oral promises to at-will employees on Tuesday while hearing oral arguments in a lawsuit involving Michael Bloomberg’s 2020 presidential campaign.

Former Bloomberg campaign staffers sued the campaign in 2020, arguing they relied on direct and public statements that they were told they would have the chance to work through the presidential election in November 2020 even if Bloomberg was not the Democratic nominee.