Overall, then, I'd say there's evidence that a white-knight candidate can succeed in executive office if he comes either from a government-dominated business sector such as telecoms where lobbying and politics are a major part of the business, or if he has been a senior officer in the secret police. White-knight leaders' terms, if politically successful, probably lead to tremendous increases in corruption, clientelism, and centralised executive power, and to bitter political polarisation. White-knight leaders generally end their terms refusing to relinquish power, and embroiled in legal difficulties or popular uprisings. So I'm not generally optimistic about the idea of electing non-politicians to fix the mess in Washington. How about you?
From a nice post by M.S. at The Economist.