I don't believe in most conspiracy theories but I fully believe that when bills are voted down, it's rigged.
What I mean is these things almost ALWAYS come down to 1 vote. It's crazy how often it happens. Not coincidence.
Everyone knows how the votes are going down, so whatever party wants to kill the bill votes JUST enough to kill it so they provide cover to those that can safely vote yes and still see it die.
So if Bernie was there, it still would have been defeated, the other side just would have switched one yes vote to no.