Megyn Kelly poses on the set of her new show at NBC Studios in New York. Her first week as host of the morning show was rocky. Charles Sykes/Charles Sykes/Invision/AP hide caption
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Russian President Vladimir Putin speaks with Megyn Kelly in the debut broadcast of NBC News' Sunday Night with Megyn Kelly. Kelly interviewed Putin in St. Petersburg, Russia. Alexei Druzhinin/AP hide caption
Brian Williams at an event in New Jersey in 2014. Julio Cortez/AP hide caption
Brian Williams speaks onstage at the New York Comedy Festival in November of 2014. Monica Schipper/Getty Images for New York Comedy Festival hide caption
During the 2012 campaign cycle, CNN was among several news networks that hosted Republican debates. Now, the GOP says it doesn't want to be on either that network or NBC. Joe Raedle/Getty Images hide caption
Meet the Press host David Gregory holds what he described as a high-capacity ammunition magazine during the Dec. 23 program. Uncredited/AP hide caption