a. the North Vietnamese military could remain in South Vietnam
The remaining challenge for Nixon's re-election bid was the ongoing war in Vietnam. In the hopes of ending the conflict in time for the vote, Nixon changed his position that North Vietnamese troops would have to leave the south as a condition of any peace.
Armed with this maior concession, Kissinger met secretly with North Vietnamese foreign secretary Le Duc Tho in Paris to negotiate a cease-fire. On October 26, shortly before Election Day, they reached a tentative accord. Nixon could now tell the American public that peace is at hand." (Shortly after the election, the agreement unraveled.)