The word 'successful' means different things to different people. To me, successful has very little to do with the economy and more to do with freedom. I would vote any president that increased all freedoms no matter what party that may be. The economy has little to do with it aside from the fact that you need the capability to make a comfortable living to be free. Besides that, being more prosperous is not necessarily better. As Taz brought up, I would not live in China for anything and the economy there is steaming ahead very well.