CBS tried to find a middle ground on fact-checking. Vance jumped into the gap.
The formal ground rules released by CBS News did not directly address the question of whether the moderators would unilaterally fact-check the proceedings. At the start of the telecast, Ms. Brennan and her co-moderator, Norah O’Donnell, told viewers they would offer each candidate “the opportunity to fact-check claims made by each other.”