The "Is It Dear Ali or Dear Ayatollah or Dear Mullah?" Edition

John Dickerson, David Plotz, and special guest Betsy Woodruff discuss the Republican letter to Iran's leaders, the Clinton nonexplanation of her private email account, and a University of Oklahoma fraternity's racist chant.   This week's episode is sponsored by “The Jinx: The Life and Deaths of Robert Durst,” the new documentary series airing Sundays at 8, only on HBO.     Join Slate Plus! Members get bonus segments, exclusive member-only podcasts, and more. Sign up for a free trial today at www.slate.com/gabfestplus.