Rep. Castro: New report means it's time for Trump impeachment
02:14Rep. Joaquin Castro discusses with Ari Melber why the firing of James Comey could be the grounds of impeachment and what he thinks will happen to Robert Mueller's investigation.
Rep. Joaquin Castro discusses with Ari Melber why the firing of James Comey could be the grounds of impeachment and what he thinks will happen to Robert Mueller's investigation.