Ali Alexander, who was a key figure in the “Stop the Steal” movement, said he had received a grand jury subpoena and would assist the expanding investigation.
The far-right presidential candidate has opened up about her personal life and tweaked her policies to gain sympathy and credibility among more mainstream voters.
The dominance of right-wing ideas in France’s presidential election campaign follows years of cultural wars waged successfully by conservatives on television, in social media and in think tanks.