Mark Salter on Trump: 'I think he could come apart'

Former top John McCain aide and one of the most prominent Republicans to publicly back Hillary Clinton over Donald Trump – tells Glenn Thrush that he believes the 2016 campaign could drive Trump insane- literally clinically insane- on cable TV. Salter also discusses the decision to choose Sarah Palin as McCain's VP and if that choice cracked the door open for Trump's candidacy.