I don't know what's to get excited this Day. Sanders will lose in a landslide. He will be at least 3 Million behind Biden in the Popular Vote and 150 Delegates behind.
I've been disappointed by the Stop Sanders movement, but it's really too uncertain to say that.
The GOP tried to stop Trump in a similar way in 2016 and failed. There is little enthusiasm for Biden, and he has underperformed his polls in some states. So it's entirely possible he underperforms expectations and Sanders still pulls out a "win" today.
