Hillary wins with Democrats and Bernie wins with everyone else that vote in open Democratic primaries.

Which are open and which are closed?

don't know about the others.

Remember all those states that Obama lost in 2008? He still won the nomination. And whether Bernie supporters like them or not, the super delegates DO count.

Florida is closed.
North Carolina is semi-closed (means no Republicans, but Independents).
Ohio is semi-open (means you have to declare which party, versus open, which means you just pick which race to vote for).
Illinois and Missouri are open.

... stating that we should have only CLOSED primaries. No independents, especially not as candidates.

The DNC has no power over it.

by this phenomenon. States shouldn't have jurisdiction over Federal elections. The Federal gov't should. I know it's a huge task for the Feds to oversee elections in 50 States, but still...

and seen as not part of the "establishment" parties. This is a group that tends to favor both Sanders and Trump, though both candidates are more establishment than they let on.
An example: Trump breaks his own arm patting himself on the back for not letting "special interests" fund his campaign--he "funds" himself...or so he says. First of all, he is 100% special interests--his own! Trump International! He is a brand! He is a business of the worst kind. Secondly, he may claim he is funding himself but he is relying on his celebrity to garner all the free publicity he can. The media may as well call itself "Trump 24/7."