Okay. Where to start? I'm a huge Sanders supporter. I've donated money and time to his campaign. He may still have a few surprising victories. The democratic nomination is effectively over barring an indictment. That won't happen because, though Hillary may have used poor judgement, she did nothing illegal.
For Putin, who I'm sure will yell at me as a fake supporter, the math simply doesn't add up. Is it mathematically plausible? Yes. It's also plausible that Martin O'Mally will un suspend his campaign and have a few wins. The support Bernie has had among voters under 40 and among independents has been incredible, and I think especially those under 40 should be the ones deciding the election (since we'll have to live with the future it creates), but unfortunately both of those groups are notoriously unreliable in the general, never mind primaries.
Had Hillary ran unopposed by Bernie, she likely would have run center or center right in the general. Now she's been pulled enough to have to run center left in the general. As far as the republican side, I'm dancing as a democrat. If Trump wins, it's an easy win for Hillary. Minority voters will come out in droves, and they'll vote Clinton in similar numbers to Obama. Texas may go her way. If Trump isn't the nominee (because if a brokered convention), he'll run independent, which will split the republican vote.
In summation, Bernie has no shot at taking the nomination. The GOP has less of a chance of winning the general. That being said, GOP probably keeps both houses