His voters/supporters/defenders/worshippers depend on his consistent loose-cannon qualities. Now you see him now you don't. Where's he gonna strike next and how? When and why? That makes him precious to them PRECISELY for the reason Merkel states. You can't pin him down. You can't rely on him. A moving target keeps 'em guessing. Right? Course he makes everyone nervous as he** but that's a small price to pay for having a UNIQUE prez. Isn't it?