Tony Abbott pulled the panic lever on Friday, and Malcolm Turnbull pushed the revenge button.
The gainers from these spectacular plays were Zali Steggall, the independent candidate who is trying to oust Abbott in Warringah, and Bill Shorten, who is handed another break in his campaign to defeat the Government.
Years ago, in a much earlier round of the climate and emissions wars, Mr Abbott referred to himself as a “weather vane”.
That accurate self-assessment invited ridicule, but his latest change of direction is beyond absurd.
For months, Mr Abbott was calling for Australia to exit Paris, like the Americans.
It was part of his unremitting campaign against Mr Turnbull, and the then-PM’s drive for a national energy guarantee.
What Warringah thinks of Abbott
New research shows Warringah voters are considering change but alternative candidates are yet to win their hearts and minds, writes Michelle Grattan.
But Mr Abbott’s new view is that leaving Paris is unnecessary.