Look, in all honesty, I don't say much beyond Trump's economy is good. I don't deny it could turn to shit under Trump. Hell, the markets already being hit by fears of the coronavirus outbreak. I don't think any president should get all the credit or fault for the economy though I get 'the buck stops here'. However, if Bernie doesn't get f**ked by the dnc and wins the presidency, his 'free' healthcare, 'free' schooling, open borders in a social welfare state and whatever else he's promising would be a disaster. Most of the others are much the same.
I could care less how other democrat presidents performed, that 'democrat' would sink the economy. Feel the Bern. So your black/white dichotomy doesn't always apply.