The congressional panel investigating last year's US Capitol riot have issued a subpoena to former President Donald Trump's personal lawyer, Rudy Giuliani.
The House of Representatives committee demanded Mr Giuliani and three others hand over documents and sit for depositions on 8 February.
Mr Giuliani travelled the US after the 2020 election to promote the baseless claim that Mr Trump had won the vote.
The riot on 6 January 2021 was stoked by falsehoods about mass voter fraud.