Respuesta :

In 1947, after the vice presidency had been vacant for most of a presidential term, Congress again changed the line of succession. ... The amendment states that the president may appoint a vice president to fill a vacancy in that office, subject to approval by both houses of Congress.

The assasination of Kennedy which made his Vice succeed him was the events that necessitated changes to the system of presidential succession.

What is the event that occurred?

In 1947, as a result of the president murder, the position of vice presidency had been vacant for most of a presidential term

Hence, the Congress changed the line of succession through the 25th Amendment that provide for Presidential Succession.

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