WI: Nixon doensn't cancel project Orion

[Euroman26]

Where would space exploration be today?

[Stalker]

Interesting but extremely expensive and dirty. The reason for cancelation, correct me if I'm wrong, was that same expensiveness and pollution of near-Earth space by explosions of the nukes.
On the other hand, once made, it could have become by itself a comparatively cheap (taking into account acceeration, mutiple usage and capacity) interplanetary shuttle probably capable to bring all necessary materias and speciaists to start colonies on the Moon (mining and industrial bases) and around Jupiter (to start project "Daedalus").

[Anaxagoras]

Nixon was the WORST president by far in terms of space exploration, but it wasn't he who caused the cancellation of Orion. It was the signing of the Outer Space Treaty of 1967, which banned the deployment of nuclear weapons in space, that brought Orion to an end.