...and if I tell you that many of Sanders' supporters also supported Ron Paul (not me, but some) in the last cycle? Yes, the traditional democrats who support Sanders will cross over easily enough, but there's a whole new demographic out there that will not, and Clinton has no such demographic. She's not appealing to any group that she didn't appeal to the last time she ran (well, other than Obama supporters, but those are arguably part of the core now -- "the youth vote" that helped Obama is now the 8 years older, and the current youth is mostly for Sanders).