They don't revoke it because the sitting President does not have security clearance. The Ofice does. He gets to see everything because the job requires it. Once he's gone, he has nothing.No, they don't revoke a former president's security clearance when he leaves office. He might not have the "need to know" in ultra secure issues but it makes no difference. I wonder if anyone panicked or considered searching Clinton's home when he "lost" the nuclear launch codes?