Ahead of Republican presidential nominee Donald Trump’s visit to Mexico, the Morning Joe panel discusses the visit’s significance in his overall campaign. Says veteran columnist and MSNBC senior contributor Mike Barnicle about Trump: “He has a form of political amnesia that allows him to say something one day that he said the direct opposite of the next day and still, up until 72 hours ago, still when the crowd wanes in terms of its love for him, he goes right [back] to we’re going to build the wall.” Will the visit make a difference? Hear more of the conversation here.