Many empires were the result of military conquest, incorporating the vanquished states into a political union, but imperial hegemony can be established in other ways. The Athenian Empire, the Roman Empire, and the British Empire developed at least in part under elective auspices.
Warren Harding, the 29th President of the United States, had a scandal with his administration called the Teapot Dome Scandal. This was a scandal that had to do with bribery and private oil companies.