The lawsuit, filed Thursday in federal court in the Southern District of Florida, names the IRS and the Treasury Department as defendants and was brought by Trump alongside his two eldest sons, Donald Trump Jr. and Eric Trump, as well as the Trump Organization. Prosecutors have said Littlejohn sought employment linked to the IRS with the intention of obtaining and leaking tax records. Trump and the other plaintiffs argue that the IRS had a legal duty to safeguard their tax data and failed to implement adequate administrative, technical, and physical protections. According to the complaint, Littlejohn accessed and disclosed tax return information belonging to Trump, his family members and hundreds of Trump Organization entities between 2018 and 2020. Littlejohn’s criminal case concluded last year, when he was sentenced to five years in prison after admitting that he knowingly and willfully disclosed confidential tax data.