nothing left in his tank. Tank? Is that a euphemism for his brain or for something lower down? It's hard to say with Key. He's nothing if not a master of vague declarations.
He also says his eight-year reign as king of the right-wing rich has been hard on his wife Bronagh and he wants to spend more time at home.
I wonder if Bronagh will be at home when Key moves back. My bet is not.