Let's say he get elected. Do you believe he would deliver on his promises?

I believe he would try for all he's worth. Will he succeed? That depends on the amount of ground support he'll be able to organize. It's far from impossible, as you seem to believe. You're forgetting one simple and obvious truth: there's more of us, a whole lot more.

As for your remark on Bernie's principles: his principle while campaigning for HRC was preventing a Trump presidency. If you think that's wrong, even today, I have several bridges to sell you...