Nixon entered his name on the New Hampshire primary ballot on January 5, 1972, effectively announcing his candidacy for reelection. Virtually assured the Republican nomination, the President had initially expected his Democratic opponent to be Massachusetts Senator Ted Kennedy (brother of the late President), but he was largely removed from contention after the 1969 Chappaquiddick incident. Instead, Maine Senator Edmund Muskie became the front runner, with South Dakota Senator George McGovern in a close second place.
On May 24, 1972, Nixon approved a five-year cooperative program between NASA and the Soviet space program, culminating in the 1975 joint mission of an American Apollo and Soviet Soyuz spacecraft linking in space.
On June 27, 1972, the two incorporated Atari, Inc. and soon hired Al Alcorn as their first design engineer. Bushnell asked Alcorn to produce an arcade version of the Magnavox Odyssey's Tennis game, which would be named Pong.
Nixon was ahead in most polls for the entire election cycle, and was reelected on November 7, 1972 in one of the largest landslide election victories in American history. He defeated McGovern with over 60 percent of the popular vote, losing only in Massachusetts and the District of Columbia.
On December 18, 1972, a few weeks after the election, Biden's wife and one-year-old daughter Naomi were killed in an automobile accident while Christmas shopping in Hockessin, Delaware. Neilia Biden's station wagon was hit by a tractor-trailer truck as she pulled out from an intersection. Biden's sons Beau and Hunter survived the accident and were taken to the hospital in fair condition, Beau with a broken leg and other wounds, and Hunter with a minor skull fracture and other head injuries. Doctors soon said both would make full recoveries. Biden considered resigning to care for them, but was persuaded not to by Senate Majority Leader Mike Mansfield. In later years, Biden commented that the truck driver had been drinking alcohol before the collision, but these allegations have been denied by the driver's family and were never substantiated by the police.