Will a socialist president collapse the economy?

Yes, because socialism destroys incentives for people to try hard. And it is those people, the 20% who create the 80% that make it so the economy can survive.

Will a conservative president collapse the economy?

What am i talking about? There are no conservative presidents in The US.
So, the economy will still collapse, but slower.

Socialism should be classified as a disease.
Totalitarianism is also a disease