Does Showstopper exhaust a unit when it moves it, and can another unit follow a unit that was moved by Showstopper?

Ruling: Moving a unit with Showstopper (or any spell) does not exhaust it, and Showstopper can be used on an already exhausted unit. A unit moved by Showstopper cannot be followed by another unit because it is a spell moving it, not the unit performing a move action.

Nuances:

• Exhausting a unit is specifically the cost for performing a standard move action
• Cards and abilities that move units don't have that exhaustion cost unless they explicitly state they do