Rudy Giuliani and two others were subpoenaed on Tuesday by the U.S. House committee investigating the January 6 capital riot.
Giuliani has been told to hand over documents and sit for a deposition next month, along with lawyers to former U.S. President Donald Trump, Sidney Powell and Jenna Ellis.
The committee also subpoenaed Boris Epshteyn, a former Trump adviser.
Committee chairman, Representative Bennie Thompson, said in a statement, "The four individuals we've subpoenaed today advanced unsupported theories about election fraud, pushed efforts to overturn the election results, or were in direct contact with the former president about attempts to stop the counting of electoral votes.”
Giuliani’s lawyer called the subpoena “political theater, while Powell, Epshteyn, and Ellis did not immediately respond to requests for comment.
Giuliani's New York attorney’s license was suspended last summer, after an appeals court determined he spread misinformation about the 2020 presidential election, won by Democrat Joe Biden.
Powell and Ellis also took part in attempts to overturn the vote.
A source familiar with the House investigation said the committee is aiming to release an initial report in the summer and a final one in the fall.