Why "Mean Girls" Get Meaner as Women, and "Real Housewives" Reunion Drama, with Dr. Erin Foster

Maureen Callahan dives into why "mean girls" become even meaner as women, and the latest "Real Housewives" reunion drama, then behavioral analyst Dr. Erin Foster joins to discuss the bullying that women do to each other, the evolutionary reasons for challenges in female friendships, and more.