As recently as a week-and-a-half ago, speaking to us after a Helensville candidates' meeting in Whenuapai, he was friendly and chatty.
But John Key's genuine warmth, one-on-one, belies a gradual loosening of his embrace with the political media, of his public engagement with the tough issues.
Even before the 2008 election, he tripped up when he suffered a memory lapse about his ownership of shares in Tranz Rail while opposition rail spokesman. Similarly, he struggled for a while to remember whether he had supported or opposed the 1981 Springbok tour. "Mildly pro-tour," he eventually concluded.
Over the course of his premiership, Key has done fewer and fewer big sit-down interviews with experienced political journalists; more and more "fluff" interviews and photo-shoots with women's magazines and tame talkback radio hosts.
But the scowl captured on his face during the now-infamous Epsom cup of tea sullied some of the previous three years of soft soap.
After the Herald on Sunday revealed that a freelance cameraman had inadvertently recorded that conversation with John Banks, the Prime Minister went on the attack.
First, he compared this paper to the News of the World, then he called in the police, then he suggested tabloid eavesdropping could drive a hypothetical teenager to suicide, then he walked out on two press briefings saying he only wanted to talk about important issues like trade and the economy.
But Radio NZ has been counting the number of times he has turned down interview requests on Morning Report. And its website reveals that National declined to answer any of the 100-plus written questions it sent parties about their policies.
And this week, Key's chief press secretary Kevin Taylor pulled his boss out of a planned Q&A interview with the Herald on Sunday - an interview that was intended to canvass just such policy issues as trade and the economy.
Neither would he agree to answer a question from Mike and Emily Wilson - the young Auckland couple who had been chosen in a readers' poll to speak for Kiwi families about the challenges finding quality time together as a family.
And that was the very issue on which he had placed so much importance in his pre-election interview three years ago. A week may be a long time in politics; three years is a lifetime.