“I didn’t really think that that had any part in a law enforcement briefing last night,” Kyl said. “It was speculation.”

Kyl said the only thing about Jared Lee Loughner that seems clear is that he is a “very mentally unstable” person.

“It’s probably giving him too much credit to ascribe a coherent political philosophy to him,” he said. “We just have to acknowledge that there are mentally unstable people in this country. Who knows what motivates them to do what they do? Then they commit terrible crimes like this.”