Final answer:
During the presidential election of 1800, there was a tie between Thomas Jefferson and Aaron Burr, resulting in a deadlock in the House of Representatives. Alexander Hamilton's endorsement of Jefferson ultimately decided the winner, prompting changes to the electoral system.
Step-by-step explanation:
The problem that occurred during the presidential election of 1800 was that the candidates from the same party, Thomas Jefferson and Aaron Burr, tied in the electoral college with 73 votes each. This led to a deadlock in the House of Representatives, as they were tasked with breaking the tie and deciding the winner. After 36 ballot attempts, Alexander Hamilton's endorsement of Jefferson swayed the final vote in his favor, making him the president-elect. This event highlighted flaws in the electoral system and led to the enactment of the 12th Amendment, which changed the way the president and vice president were elected.
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