Janet Brown, the executive director of the Commission on Presidential Debates, said Sunday that she does not believe moderators should play a large role in fact-checking each candidate at the event. Speaking with Brian Stelter on CNN’s Reliable Sources, Brown said the candidates should be the judges of what the other says. “I don’t think it’s a good idea to get the moderator into essentially serving as the Encyclopedia Britannica,” Brown said. “And I think it’s better for that person to facilitate, and to depend on the candidates to basically correct each other as they see fit.” The first presidential debate between Donald Trump and Hillary Clinton is Monday night at 9 ET. NBC News’s Lester Holt is the moderator.