What explains the clampdown mania among liberals? The most obvious answer is because they need an excuse. Consider the history: the right has enjoyed tremendous success over the last few decades, and it is true that conservatives’ capacity for hallucinatory fake-populist appeals has helped them to succeed. But that success has also happened because the Democrats, determined to make themselves the party of the affluent and the highly educated, have allowed the right to get away with it.

—Thomas Frank in The Guardian

He’s right. 

The modern Democratic Party, particularly under Clinton and Obama, was hostile to organized labor, and favored finance and international labor arbitrage over the well-being of the average working American.