The right answer is: 1. Strong social opposition to the war. 2. President Richard Nixon´s desire to get reelected.
Explanation:
In the 1960s, a peace movement was born and developed into a formidable social and political force. Opposition to war in Vietnam was massive, and it effectively put pressure on US decision-makers and the course of the conflict. Besides, president Nixon wanted to fulfill his promise to sign a face-saving peace "with honor". Nixon wanted to win reelection in 1972, he calculated that getting a peace deal with the Communist Northern Vietnamese would help him achieve that goal.
Andrew Jackson was elected president in 1828, partly due to the South’s belief that he would pursue policies more in line with the interests of Southern planters and slaveholders. Indeed, Jackson had chosen John C. Calhoun, a native of South Carolina, as his vice president.^3
