Jenna Ellis, a colleague of Rudy Giuliani, told the White House that she received a positive coronavirus test on Monday, Axios reported Tuesday. She refused to confirm the diagnosis or give an update on her condition.
Meanwhile, Giuliani, President Donald Trump's personal attorney, tweeted Tuesday that he is feeling well and continuing to recover after being hospitalized with COVID-19 on Sunday.
Ellis attended a White House senior staff Christmas party on Friday, raising fears that she may have infected other officials or their families.
Like most Trump officials, Ellis shuns protective face masks and did not wear one at the event.
The diagnosis was the latest blow to Trump's long-shot effort to overturn his loss to President-elect Joe Biden.
Along with Giuliani and far right-wing firebrand Sidney Powell, Ellis dubbed the team an "elite strike force" that would battle for Trump from coast to coast.
The group, which dumped Powell amid intramural squabbles, has suffered a humiliating string of dozens of legal setbacks, many inflicted by Trump-appointed judges.
Ellis has no experience arguing federal election law, and most of her courtroom experience involved mundane liability lawsuits.