Explain why amendments were needed to change rules about presidential elections, terms, and succession.

The need for amending the procedures set forth in the Constitution for electing a president and vice president were necessary because of the ambiguity in Article II, Section I.

Explanation:

Before the 12th Amendment, the vice presidents were chosen from the same pool of candidates that stood presidential elections. The vice president was usually the runner up and that made Thomas Jefferson, from the from the Democratic-Republican Party, the vice president elect during the 1976 election while John Adam was the first in the election, the president elect from the Federalist Party. The ratification of the 12th amendment in 1804 paved way for both president and vice to appear under same party ticket.

In the 20th Amendment, January 20 became the date for the swearing in of the president and vice president unlike what was obtainable.

The constitution did not talk about the term limits until the 22nd Amendment, which put a two-term limit on the presidential tenure arrangements.