"Generic" always polls better than any actual person.
"Generic" is the ultimate hero who has no baggage or disapproval of any candidate & magically takes tremendous margins. Would be especially handy against someone as unpopular as Trump.
Anyways Other Data -
Male - Trump +5
Female - Sanders +15
18-29 - Sanders +23
Dems - Sanders +61
Ind - Sanders+9
GOP - Trump +57
Whites - Trump +3
African American - Sanders +53
Hispanic - +24
On Issues - Sanders has a wide lead in Healthcare, Education, Medicare/SS, Trump on Security, Economy is 50/50 odd. 18% of Hillary Clinton 2016 Voters are in Don't know while Bernie gets 76% of the Clinton 2016 vote.
How on earth does Trump have as much support from the GOP as Bernie has from the Democrats?
Biden for example is much ahead among Democrats vs Bernie which is boosting his numbers.