today. he can mobilize a lot of young people. if he can do it that can he make a dent, but he can't win. especially the minority voters. >> the good news for him about, a third of the americans don't know who he is. he's known in iowa and new hampshire. so they may like the populist message. but there is a cultural barrier separating him from african-americans and latinos that i'm not sure he knows how to cross. >> ryan lizza did reporting in the new yorker magazine and he got a hold of this memo back in 2007 that then senator barack obama senior staff and polster one of whom works for hillary clinton now wrote how to beat hillary clinton, where is she most vulnerable. they write she's driven by political calculation not conviction. regularly backing away and shifting positions on issues ranging from are war to social security to trade to reform.