Back in the before-times, when we used to go into the radio station every day, our office next-door neighbor was WNYC host Brian Lehrer. He hosts a 2 hour live radio call-in show every day from 10 to noon in New York city.

In this segment from his show he examines the relationship between Dr. Oz and Oprah Winfrey.

The Trump-endorsed Dr. Oz recently won the Republican Senate primary in Pennsylvania. One reason the doctor is so popular, despite the many critics who say he promotes unscientific therapies and cures, is his many appearances on Oprah Winfrey's long-running daytime talk show. Kellie Jackson, historian, associate professor of African Studies, Wellesley College and host and executive producer of the Oprahdemics podcast, and Leah Wright Rigueur, associate professor of history, Johns Hopkins University and co-host of the Oprahdemics podcast, talk to Brian about Oprah's role in giving Dr. Oz a platform, what he became and if she has any responsibility to speak out.