The 14 relatively unknown individuals receiving subpoenas included David Shafer and Michael McDonald, the chairmen of the Georgia Republican Party and the Nevada Republican Party, respectively. Shafer and McDonald did not immediately respond to requests for comment.

The Republican Party operatives were asked to provide documents and sit for deposition interviews in the coming weeks.

The U.S. president is selected by 538 electors who are apportioned based on each state's population.

Officials on Donald Trump's 2020 campaign, led by his lawyer Rudy Giuliani, oversaw efforts https://www.reuters.com/world/us/trump-campaign-officials-including-giuliani-oversaw-2020-fake-electors-plan-cnn-2022-01-20 to put forward illegitimate elector certifications from seven states that the former president lost, CNN reported last week.

The U.S. Justice Department is also investigating the certifications, which Trump's allies sent to the National Archives in December 2020.

"We believe the individuals we have subpoenaed today have information about how these so-called alternate electors met and who was behind that scheme," committee Chairman Bennie Thompson, a Democrat, said in a statement.

The Select Committee has spoken to about 400 witnesses and has issued dozens of subpoenas.

The committee is aiming to release an interim report in the summer and a final report in the fall, a source familiar with the investigation said last month.

(Reporting by Jan Wolfe; Editing by Andy Sullivan and Rosalba O'Brien)

By Jan Wolfe