You do not need to be a mind-reader to spot when the Prime Minister is under real pressure in Parliament. His answers to Opposition questions suddenly get drastically shorter, often being pared-down to a one-word "yes" or "no" and his reply is followed by what is now almost a trademark sharp and very audible intake of breath.
There were plenty of those yesterday as the Greens' Russel Norman sought to skewer John Key on the question lingering after Nicky Hager's book, Dirty Politics. Did the Prime Minister know more about what was going on in National's dirty-tricks department than he has been letting on?
Norman asked Key how many times he had spoken to Whale Oil blogger Cameron Slater or sent a text.
"None in my capacity as Prime Minister," Key replied. That wording was very deliberate.
Key's argument is that any communications with Slater occurred in his capacity as leader of the National Party, not as Prime Minister. The distinction is important. It allows Key to wriggle free from his detractors, even if it is not very becoming.