"For whatever reason (and there were numerous apparently) Democrats let the clock run out."
Democrats in elected federal office are generally wealthy, straight, and older. These are the types that will not suffer the consequences of the election like many of us will, so the need for action, even when they acknowledge the need, just isn't that urgent to them. Plus they have Citizens United to shield them from charges of inaction.
Not that it matters, or that any of y'all will believe it, but I rode the train with this dude two separate times the weekend before he was killed. The stories about his behavior match the general description in the media. He was definitely going through it. He was loud, angry, frustrated, but more sad and hopeless sounding than anything else. I remember wanting to keep my distance but also felt bad for the guy. It was not an awesome time riding with him, but I did not fear for my or anybody else's safety in the moment.