Could Firing of James Comey Mark the Beginning of the End for Trump Presidency?

Many people are comparing Trump's firing of FBI Director James Comey-who only weeks earlier had confirmed the FBI was investigating whether the Trump campaign worked with Russia to sway the 2016 election-to the Saturday Night Massacre when President Nixon fired independent special prosecutor Archibald Cox. Is Comey's firing the beginning of the end of the Trump presidency? For more, we speak with Pulitzer Prize-winning investigative journalist Glenn Greenwald.