Democrats face an interesting dilemma. Those who bother to turn out for their primaries largely decide the identity of the party's nominee. Their primary voters are hot to trot for progressive, socialist ideas.
Hence, there is a serious likelihood they'll nominate this generation's version of George McGovern, someone whose "Uncle Sam will be your daddy" rhetoric warms the cockles of their hearts. Such individuals can be very popular with a sizable, but far from majority, segment of voters, as Bernie Sanders was four years ago.
As Republicans found with Barry Goldwater, and Democrats found with George McGovern, nominees who are "out there" normally flop in the general election. This is something party stalwarts like Rahm Emanuel and Barack Obama have been trying to communicate to Democrat candidates.
If the behavior of those running is any indication, none of the leading candidates is paying attention. Perhaps their polling suggests caution is primary poison this time around.
The New York Times runs an article, here echoed on MSN, which makes the point that putting down working class voters - clingers to guns and god - isn't good politics. Calling them "deplorable" isn't helpful either. Hat tip to RealClearPolitics for the link.
Notice that D. J. Trump never puts working class voters down, but rather honors their views, patriotism and citizenship. Many vote for him in consequence. This isn't rocket science, it's smart politics.