Who knows who will emerge from the crowded field to become the Democratic presidential candidate in 2020? However, it is pretty clear that Donald Trump, the GOP and the conservative media will blast that candidate, even if he or she is a slightly left of center traditional Democrat, such as Joe Biden or Amy Klobuchar, as a dangerous socialist.

They’re already doing it, saying all Democrats have signed on to new Congresswoman Alexandria Ocasio-Cortez’s call for a 70 percent marginal federal…