Sen. Ben Cardin on the decision to not call witnesses: ‘We were all witnesses’

Senator Ben Cardin (D-MD) joins ‘Velshi’ to discuss the second impeachment trial of Donald Trump and the controversial decision by the managers not to call witnesses after winning a key vote. Sen. Cardin says the “only witness I would have liked to hear from” is Donald Trump who “did nothing when we were all in harm's way when his own Vice President was at risk.”