> When science fiction writers first imagined robot invasions, the idea was that bots would become smart and powerful enough to take over the world by force, whether on their own or as directed by some evildoer. In reality something, only slightly less scary is happening. Robots are getting better, every day, at impersonating humans.

This is actually the main plot point of Asimov's 1946 short story Evidence, which was later republished in I, robot (1950). Stephen Byerley is running for office and the main protagonists are trying to figure out if he is human or a robot.

Edit: Removed spoiler