Rep. Dennis Kucinich (D. Ohio) suggested today that President Bush's comment about a nuclear Iran precipitating "World War III" is a sign of mental instability.

"I seriously believe we have to start asking questions about his mental health," Kucinich, a back-of-the-pack candidate for president, said in an interview with The Inquirer's editorial board. "There's something wrong. He does not seem to understand his words have real impact."

At a news conference two weeks ago, Bush said, "I've told people that if you're interested in avoiding World War III, it seems like you ought to be interested in preventing them (Iran) from having the knowledge necessary to make a nuclear weapon."

“Dennis Kucinich has always been a hard guy to take seriously. but this takes the cake," said Dan Ronayne, Republican National Committee spokesman. "Maybe he thinks preposterous quotes are the only way he can get his failed campaign any attention.”

Kucinich, who thinks Bush and Vice President Cheney should be impeached and charged with war crimes, is running sixth in most national polls. He said he doesn't believe his comments about the president's mental health are irresponsible.

"You cannot be a president of the United States who's wanton in his expression of violence," Kucinich said. "There's a lot of people who need care. He might be one of them. If there isn't something wrong with him, then there's something wrong with us. This, to me, is a very serious question."

Kucinich is in Philadelphia to participate in the presidential debate tonight at Drexel University.