What’s so terrible about a brokered convention? It used to be the norm. The convention that’s all balloon drops and PR for the nominee only came into existence in the Forties.
I like a lot of Sanders’ ideas but don’t think he’s electable and so hope the upcoming primaries change his status. I don’t care whether or not he’s the best candidate. What I want is a candidate who can get those undecided voters. I don’t think Sanders is that guy.
Back then, we didn’t have people arguing that it’s okay to not vote for the Democratic nominee, AFAIK. With things so contentious and fractured, I think you need a clear winner, and as much time as possible to get everyone together.
I also think Trump could capitalize on a perceived lack of decisiveness in the Democratic Party. “Why would you vote for this guy when even most Democrats didn’t support them?”