Kagan, Janet. "Space Cadet"
What if: Dan Quayle became president, or an actor, or a soldier, or an astronaut.
Summary: Pres. Quayle tries out the 'Things As They Should Be' machine, seeing other roles he might have filled, but makes a mistake while visiting Mars.
Published: In By Any Other Fame (eds. Mike Resnick and Martin H. Greenberg), q.v.