People feeling a quick reward by a dopamine hit of clicking the downvote certainly isn't based on someone's political leanings, who they like or dislike, and certainly is due to laziness - regardless of whatever labels you give yourself.
Likewise, Trump's behaviour is in a completely different league than what any other politician in the US has presented - regardless if self-labeling as Democratic or Republican; albeit it is becoming more and more clear who is a disgrace to humanity.
Warren I'm not sure of, with Sanders I agree - at least with the Federal Jobs Guarantee is the wrong solution because it kills the power and efficiency that capitalism allows in a free market, fluid system - that efficiency which requires hierarchy of expertise to lead and teach, and that require making micro and macro decisions quickly for every decision possible; a bureaucratic government agency simply can't incentivize people, leaders, to reward them for what they deserve for who they are and what they know they are leading towards. I agree with your sentiment that "big government knows best for you" is badly implemented in most cases - and why I believe POTUS candidate Andrew Yang (yang2020.com) will win: his Freedom Dividend (UBI, Universal Basic Income) of giving every adult American $1,000 / month is taking the decision making away from the government and giving it to each individual to decide for themselves; the small, simple role of the government here then is simply collecting the VAT tax and distributing the $.
I don't worry about downvotes - however the mechanism generally infuriates me though as it's horrible for learning opportunities, self-development, communication/language and community development. A huge thank you to you for taking the time to respond, even though someone (not me) downvoted you - someone lazy or inarticulate - under developed, unchecked thoughts through critical thinking process nor peer review perhaps fear of ridicule or finding it would be a "waste of time" - so they simply "contribute" by a quick click of the downvote.
P.S. I had to wait initially 1 hour before I last tried replying - as I apparently some mechanism triggered - presumably by the small number of downvotes all of my comments were getting - to say I was "posting too frequently." And it's been 3+ hours now that I try again. If this doesn't work then I've been blocked from commenting - for how long then I wonder, and why.