How Trump firing Jeff Sessions could end Mueller probe

President Trump has fired Attorney General Jeff Sessions and installed a Trump loyalist as Bob Mueller's new boss. Ari Melber breaks down how Trump appears so intent on taking control of the investigation into his own campaign and White House that he is willing to risk all guilty looking inferences that come with this kind of move. Former Federal Prosecutor John Flannery says he has "no doubt" this move will become part of the obstruction probe.