How did the Vietnam War lead to limited power for the U.S. president?

The president was prevented from fighting in Cambodia
The president could not act alone without UN support
Congress passed the War Powers Resolution to limit unchecked military action
The U.S. had to refrain from other proxy wars

The Vietnam War contributed to limited power for the U.S. president in several ways. One significant factor was that the president was prevented from expanding military involvement into Cambodia without approval from Congress. Additionally, the idea of acting unilaterally or without international support, such as from the United Nations, became less politically feasible after the Vietnam War.

In response to the perceived overreach of executive power during the conflict, Congress passed the War Powers Resolution in 1973. This legislation aimed to prevent unchecked military action by requiring the president to consult with Congress before sending troops into hostilities and limiting the duration of military engagements without congressional approval.

Furthermore, the costly and controversial nature of the Vietnam War made the U.S. more hesitant to engage in other proxy wars or military interventions in the future, leading to a more cautious approach to foreign policy and limited the president's ability to unilaterally commit military forces. Ultimately, the Vietnam War had a lasting impact on American politics and the balance of power between the president and Congress in matters of war and foreign policy.