Final answer:
The election of 1800 resulted in the peaceful transfer of power and the adoption of the 12th Amendment, but did not mark the decline of the Democratic-Republican Party or lead to John Adams becoming president.
Step-by-step explanation:
The election of 1800 had several significant effects, but among them, two stand out:
- It established the peaceful transfer of power, setting a precedent for future changes in political parties within the US government. This event alleviated anxieties about potential violence when a new party assumes control and has been deemed as a "revolution" due to its peaceful nature.
- The election led to the adoption of the 12th Amendment to the US Constitution because Thomas Jefferson and his running mate, Aaron Burr, initially tied in the Electoral College votes. This situation exposed flaws in the electoral system and the amendment was created to prevent such a tie in the future by having separate votes for President and Vice President.
The election did not mark the decline of the Democratic-Republican Party nor did it contribute to an era of bipartisanship, as party tensions remained high. Additionally, John Adams did not become president as a result of the election; rather, Thomas Jefferson won the presidency, taking over from Adams.