Because the people who vote Democrat for the most part don't pay taxes or if they do what they pay is negligible. Democrat voters are on the receiving end of government largess so naturally they want higher taxes on the productive segment. I suspect the average Democrat voter does not get up in the morning and say to herself (little gender equality there) "I'm going to better my position by working harder and learning new skills" but rather "I'm just as good as those people who make so much money by taking what should belong to me and I'm going to vote for the candidate who gives me what I'm owed." Democrat voters have a bone deep (and completely undeserved) sense of entitlement.
. ... impeaching Trump throwing the borders open and repealing the second Amendment?
They've been taught to hate Trump by the media and they do. Open borders don't mean anything to them. They hate the responsibility that comes with owning a firearm, and most Democrats are not people who want responsibility - rather they want the promise (however false) of security that big government gives (but doesn't deliver)
Totally nailed it. There are unfortunately a lot of people in the country with this entitlement mindset.