Education? That's a tough one. Hard to tell which direction in education is the best way. I think school competition could be good, but could also backfire and force certain people into bad schools. I have no idea for a candidate on that issue.

Economics? I know people hate this, but... Trump. He knows how to run a business, and a large business at that.

Immigration? It depends what you mean by "fix." Get rid of illegal immigrants? Make them citizens? I'm not sure if Democrats (or Republicans to a degree) have any idea on future preventative measures, which is the most important thing, so we don't have this problem again in the future. I personally liked John Kasich's idea for how to handle the immigration issue.