What should be worrying is similar to what SJ was posting that article about, the Dems are going more and more left, there seems fewer and fewer centrist Dem candidates. The problem with the 2 parties before is that they shared many of the same policies, party because they were paid off by corporate interests. Now they're not even in the same area code. Huge polarization.
Imagine a Bernie Sanders (or discipline) vs Trump. 2 polar opposite visions, when really most of the country probably wants something in between. To the left of Trump but to the right of Obama.