Rep. Gowdy on Trump "Spygate" claims: Informants used "all day, every day"
President Trump is doubling down on his claim that the FBI had a spy in his campaign. The president said last week the use of an informant could be "one of the biggest political scandals in U.S. history." Republican Rep. Trey Gowdy of South Carolina, chairman of the House Oversight and Government Reform Committee who attended a classified Justice Department briefing in response to the president's allegation, joins "CBS This Morning" to discuss why the FBI had an "obligation" to run out leads in the Russia investigation.