As the cliche goes, the definition of insanity is doing something over and over again and expecting a different result. It's also been the practice of Democratic Party establishment, on and off for many years.
Before you brush this topic off as irrelevant, you might want to consider how often it comes back into political discussions along with the lie that it was a war resolution rather than a peace resolution.
DNC, don't chase after Trump voters. Instead, use the Field of Dreams approach, "If you build it, they will come."
There is substantive case to be made against the nomination of Hillary Clinton and an equally substantive case for her general election candidacy.
Are the Moderate Democrats unaware that by being focused on praising and pandering to the "white working class"/"good people on both sides" crowd, they are insulting, taking for granted and alienating the very Democratic voters who are younger and African American that they need to actually win?