I think that it is still a valid topic to discuss why we lost the General Election as a way of developing new strategies for winning elections in 2018 and beyond. We need to learn from our mistakes. That means we have to determine what those mistakes were by looking back at the recent past.
I know there is some controversy about what those mistakes might be, but I hope that we can have a healthy discussion about this. We need a winning strategy for 2018, and that means we need to have an honest assessment of our strengths and weaknesses. We need a strong opposition to Trump right now. That means a reality based strategy that understands why Trump won and how to counter that.
There is an article on Politico that speaks to why Hillary might have lost Michigan. I think that it is a good place to start. We need to speak directly to voters and citizens, and not be remote from them using polls and analytics. "People, Not Polls". I think we relied too much on numbers and assumptions this election, when speaking directly to the voters is a sounder strategy.
This is the Politico Article:
http://www.politico.com/story/2016/12/michigan-hillary-clinton-trump-232547