Gowdy: Obama would be relevant as an impeachment witness

Fox News contributor Trey Gowdy weighs in on calls for witnesses in Senate trial. FOX News operates the FOX News Channel (FNC), FOX Business Network (FBN), FOX News Radio, FOX News Headlines 24/7, and the direct-to-consumer streaming service, FOX Nation. FOX News also produces FOX News Sunday on FOX Broadcasting Company and FOX News Edge. A top five-cable network, FNC has been the most-watched news channel in the country for 17 consecutive years. According to a 2018 Research Intelligencer study