"Corrupt Bargain" of 1824
In the 1824 election (Andrew Jackson vs John Quincy Adams vs William H Crawford vs Henry Clay), when Andrew Jackson won the popular vote but not the majority of the electoral vote. According to the Constitution, the house of Representatives, for which Clay was the speaker, had to choose out of the top three candidates, giving Clay influence over who was chosen. Clay disliked Jackson and Crawford was out because of a paralytic stroke, so Clay made Adams president. In return (and this spawned much protest and scandal), Adams made Clay the Secretary of State. But the decision stood, showing how American political policy was changing.