Based on how Patty Murray (D) has said she would have voted YES but wasn't able to get to DC in time, it's clear it was never going to pass to begin with. This happens often – someone like Mitch McConnell might whip the votes, realize they're ahead, and allow a few Republicans that are at-risk to vote YES to provide cover for them in the future. Remember, even if you count the two Independents as Democrats, there's still 6 more Republicans. We've seen this with Susan Collins a lot; if Republicans don't need her vote she'll vote against them. But when they need it, she votes with the party like clockwork.
So, now we get to be mad at Sanders and Murray (the Democrats who weren't in DC), and nobody blames the 37 Republicans who actually killed it. Remember that McConnell decides what is voted on, and he always knows the votes. Maybe the one exception ever was McCain saving Obamacare.
I feel certain Sanders would have voted YES. He's historically been mostly pro-Snowden, anti-surveillance, and pro-whistleblowers (it's nuanced; for example he thinks Snowden should be prosecuted but also thinks what he did was right and that he should get a plea deal).
(Not the point, but it's insane Senators have to be physically present, especially given the situation. At least one Senator missed the vote due to quarantine. Why are we making a 78 year old man physically fly to DC to vote, and do so in a chamber full of at least one person who has had COVID-19 recently?)
Like I said, I'm still disappointed we haven't even gotten a statement from Sanders yet. But this whole thing has been on my mind a lot today.