Final answer:
In the late 1960s and 1970s, assassinations, the Vietnam War, political scandals like Watergate, and cultural events like Woodstock led to a loss of faith in the political system and national leaders.
Step-by-step explanation:
The events that caused voters to lose faith in the political system and the nation's leaders in the late 1960s and 1970s were manifold. The assassinations of prominent leaders such as Martin Luther King Jr. and Robert Kennedy, the Vietnam War, and subsequent protests, like those at Kent State University, deteriorated public trust in government. High-profile political scandals, notably Watergate, further eroded this trust. The period also saw cultural shifts, with events like Woodstock reflecting the youth's embrace of rebellion, individuality, and freedom, while the moon landing stood as a rare unifying achievement that temporarily bolstered national pride amid growing societal divisions.