How is it that with seven days left until the election, we are consumed anew by Hillary Clinton’s emails? We sift through the still-unfolding facts and implications of the case with our guests: two New York Times reporters who have covered the investigation since it first emerged, Amy Chozick and Michael S. Schmidt; Carrie Cordero, a former attorney at the Department of Justice who worked closely with the F.B.I.; and Nate Cohn of The Upshot, to tell us what impact this could have on the election.