Luke shot first?

Actor Mark Hamill—still, decades later, best known for his turn as Luke Skywalker in the original "Star Wars" trilogy—is warning voters that Mitt Romney "only imitates human behavior. He's not actually human himself." No word from Hamill on whether the Republican standard-bearer is more machine, now, than man, twisted and evil. Or whether the ugliness of the 2012 campaign is giving Mos Eisley a run for the title of most wretched hive of scum and villainy.

The actor made his comments to the entertainment website OnTheRedCarpet.com at Comic-Con in San Diego. The riff began as Hamill fondly recalled watching "Zorro" as a kid."I knew nothing about Mexican history or anything. But just the idea of a privileged person fighting for the underdog—there's something very romantic about that," Hamill said. "I guess it goes back to Robin Hood. People that are fighting for the middle class and for the have-nots. It's something that we see even playing out in the presidential race.

"And if you don't vote for Barack Obama, you're insane," said Hamill, who gave his voice to the Joker in the recent smash-hit video game "Batman: Arkham City."

"'Cause without him, I think the middle class will completely disappear. And you look at Romney—and I'm sure he's a nice guy, but I think he's like The Thing: He only imitates human behavior. He's not actually human himself. "