I think the old school dems (like myself, I left and will never return) that left did so because working across party lines was impossible. Very few presidents even try it anymore, that's a shame. Both parties are full of self serving jerks, pretending to be champions of the people. If you notice I do a lot of anti incumbent memes but get attacked by progressives for not following the crowds. I think that is why they hate Trump, he picks a direction and never looks back, their opinions doesn't bother him.