I can only assume the question refers to the 12th Amendment ratified on 15 June 1804.
Prior to this, no one ran for the post of VP and the position of vice president was the candidate who got the second most votes. This method did not work well with partisan elections and was changed so that each Elector voted for a President and separately voted for a Vice President.
The Election of 1800. Each side believed that victory by the other would ruin the nation. Federalists Archiving Early America presents specific examples of how these acts were abused and the role they played in the Election of 1800.
They were repealed because of the change of government.
The taxes to remain after the Townshend Acts were repealed were the Intolerable/Coercive Acts and the other big tax to remain is the Tea Acts
tea
The taxes to remain after the Townshend Acts were repealed were the Intolerable/Coercive Acts and the other big tax to remain is the Tea Acts
The election of 1800 was more important than the election of 1796. In 1796 George Washington was elected president unopposed. The election of 1800 had several people vying for the presidency.
Thomas Jefferson
The election of 1800 proved that the executive branch could be won by an Anti-Federalist.
The alien act of 1798 gave the president the power to deport dangerous aliens.
The election of 1800 is called the Revolution of 1800 because power changed hands without war. The Federalist Party had held powers since George Washington's first election in 1788.
Tea
the stamp act was repealed