From the article a description of note says it all  ... "So far, running campaigns on the political equivalent of road rage isn’t working."

The AP Takes a Sober Look at the Democrats

".....Werner quotes a range of Democratic reaction to the special election losses, but I think the most sensible comment comes from Congressman Seth Moulton:

    The outcome “better be a wake-up call for Democrats — business as usual isn’t working,” Rep. Seth Moulton, D-Mass., said over Twitter. “Time to stop rehashing 2016 and talk about the future.”

I think that is right. The Democrats need to move on from their 2016 defeats. So far, running campaigns on the political equivalent of road rage isn’t working...."

"....For my part, I hope the Democrats heed the counsel of Jim Dean of Democracy For America, who says Ossoff and the others lost because they failed to “[run] on a bold progressive vision.” In 2018, it would be great to see 435 Democratic House candidates who are all bolder and more progressive than Jon Ossoff."

http://www.powerlineblog.com/archives/2017/06/the-ap-takes-a-sober-look-at-the-democrats.php