Desperation? Trump’s top aide now suing Trump over impeachment testimony

06:48

The potential linchpin to the impeachment case, Mick Mulvaney, tried to join a lawsuit against his boss, President Trump, about who has to testify against Trump. MSNBC Chief Legal Correspondent Ari Melber breaks down the unusual gambit, the divisions in Trump land, between those who wish to testify and those who wish to stonewall, and legitimate reasons aides get caught in these situations.