But Paul P. Casadonte, MD, a psychiatrist and associate clinical professor at New York University, cautions in an interview that research is not yet strong enough to show a causal link between marijuana use and serious mental disorders. He suggests that such claims by Walters and other administration officials were intended to further the Bush administration's efforts to quell young peoples' marijuana use.

"That's dangerous territory. It's politics more than science at this point," says Casadonte, who is also director of substance abuse treatment programs at New York Department of Veterans Affairs Medical Center.
What a bunch of fuckin' dopes