Final answer:
President Dwight Eisenhower supported the temporary partitioning of Vietnam into north and south sections called the Geneva Accords in 1954.
Step-by-step explanation:
The United States president who somewhat reluctantly supported the temporary partitioning of Vietnam into north and south sections was President Dwight Eisenhower. In 1954, the United Nations brokered an agreement known as the Geneva Accords, which designated the 17th Parallel as the temporary border between the two sections of Vietnam. This partitioning was intended to be temporary until UN-supervised elections could be held in 1956.