This from the great novel, The Postman, by David Brin:
[A dream version of Ben Franklin opines] “It’s said that ‘power corrupts,’ but actually it’s more true that power attracts the corruptable. The sane are usually attracted by other things than power. When they do act, they think of it as service, which has limits. The tyrant, though, seeks mastery, for which he is insatiable, implacable.” — David Brin, The Postman, page 267
Mr. Fu presents, the nominees for the President of the United States, 2008.