|The Marx Brothers -- Americans May Like Groucho, But They Generally Do Not Like Karl|
The Nation is one of the oldest (1865) and most respected progressive (or left wing) periodicals that has been continuously published in the United States. You can read about their rich history of associations with progressive writers and luminaries here; they were on of the first notable national publications to endorse Bernie Sander's campaign in January 2016.
Our first piece of evidence concerns a Gallup poll on the subject of who Americans will vote for for President by group identity.
Gallup is the best known pollster in the U.S.A. Although this poll is three years old, these views change slowly over time.
Socialists are the most unpopular group. They are the only group that more Americans would not vote then would when asked.
In order for Democrats to take control of the House in 2018, they must win 23 districts that are now Open or in Republican hands in suburban and rural areas. It is not beyond logical comprehension to assume that these voters will not respond well to the term "Democratic Socialist" as party identification --- especially when Trump remains popular in red state areas.
In addition, Democrats must defend sitting Senators in the following states that voted for Trump in order to have a chance of taking over the Senate, and win open seats in the red states of Arizona and possibly Tennessee.
The term "socialist" still alienates in mid-America.
Moving hard left, and adopting Democratic Socialism, may play out in places like California, New York City, and Vermont, but could prove disastrous for Democrats in other area.