The decision by the four Republicans, including Representative Kevin McCarthy, the minority leader, had broad implications for the inquiry and for congressional powers.
The committee’s subpoenas to five House Republicans underscore the potential importance of their testimony to producing a full account of the effort to overturn the 2020 election.
The subpoenas for five G.O.P. members of Congress, including the House minority leader, sent a shock wave through a divided Capitol and left lawmakers wondering what’s next.
The leaders of the House committee investigating the Capitol attack said they were demanding documents and testimony from Kevin McCarthy of California and four of his colleagues.