has already caused plenty of panic in the White House over her wild ways — but now Radar Online
has bombshell exclusive video
that catches her puffing on what eyewitnesses claim to be a joint! Even worse, Malia's toking was caught by The National ENQUIRER (on newsstands now) while at the Lollapalooza Festival in Chicago, as she embarrassed Barack and Michelle Obama
by blowing off the Democratic National Convention in Philadelphia!