As a classical liberal I identified myself with the Democratic party far more so than the GOP on many layers. What is out there today has nothing to do with what this party was about 30 years ago. Today, they are dangerous. The ideas they are pushing are destructive. If they gain overwhelming power they will destroy this nation.
I've seen this playbook before in Latin America --many times-- it doesn't end well. It's about to be played yet again in Argentina with the new government that was just elected. There are people already trying to figure out how to get the hell out before the mutation into Venezuela sets in.
You say you are a Democrat. You are on HN. I somehow doubt the total lack of mathematical honesty in a ridiculous 52 trillion dollar disaster of a healthcare plan would not cause you projectile vomiting. These people are dangerous. They actually believe this stuff. And if they gain power we are all going to suffer for it.
The proper context is external to the US: China. They are laughing their asses off right now and just hoping people like Warren or Bernie ascend to power. If they get another eight years of unimpeded growth they will ascend to the first economy of the world and be unstoppable. There are very few industries left in the US and Europe that they can't absorb. They would love for the US to go full-tilt left and, as a result, cause severe damage to it's economy. It would clear the path to supremacy. And then we get the reality of a world led by China, with hooks into absolutely everyone.
Check this out:
https://www.thesun.co.uk/news/7037663/china-colonising-small...
and this:
https://www.nationalreview.com/2018/08/elizabeth-warren-plan...