President Trump marks his first year in the White House on Jan. 20. Since he took the oath, he's been dogged by questions about his hundreds of businesses and the conflicts of interest they pose.
In attempts to confront Trump and force him to address these conflicts, congressional Democrats, state attorneys general and watchdog groups have sued the president. So far, their cases have not advanced very far in court. A federal judge has dismissed one suit.
But there's another legal challenge to Trump, and that's coming from a lone attorney in Washington, D.C. — Jeffrey Lovitky, a solo practitioner who often sues federal agencies over complying with regulations.
Last year, he wound up suing Trump after combing through the president's personal financial disclosures. At the time, he told NPR it's not easy deciding to sue a sitting president.