Final answer:
After winning the election, Nixon did not immediately fulfill his promise to end the Vietnam War with 'peace with honor' as he prolonged and escalated the conflict initially. However, he did have to work with a Democratic Congress, which asserted oversight of war spending and passed the War Powers Resolution.
Step-by-step explanation:
After Richard Nixon's victory in the presidential election, there was a complex aftermath that includes both his actions and the political context he step into. Nixon's promise to end the Vietnam War, framed as "peace with honor", was a central element of his campaign. However, once in office, he initially prolonged the war and escalated it in some areas, despite public promises. This approach was in line with his belief that the North could be defeated, a belief that contradict his public statements. The eventual withdrawal of American forces and the Paris Peace Accords did technically end US involvement, but the extension of the war and the conditions left behind raise questions about the fulfillment of that promise in the spirit it was made.
In terms of working with Congress, it is true that Nixon had to work with a Democratic Congress, which later played a significant role in opposing the war and asserting greater oversight through measures like the War Powers Resolution. Nixon's presidency was heavily marked by his foreign policy actions, but domestically, he also faced significant challenges like the backlash following the Pentagon Papers and the Watergate scandal, which would ultimately lead to his resignation.
Answer to the question: D. He had to work with a Democratic Congress.