This is Turnbull justifying his challenge with a poll. Ok it's a news poll but it's still a poll.
MALCOLM TURNBULL: The one thing that is clear about our current situation is the trajectory. We have lost 30 Newspolls in a row. It is clear that the people have made up their mind about Mr Abbott's leadership.
http://www.abc.net.au/7.30/content/2015/s4312404.htm
