He is not "fair dinkum". Remember his "salute" (and warmth) to George Bush?, shortly followed by his unethical behaviour of alerting journalists that George Bush didn't understand what the G20 was. What message does that send to Obama? Our PM cannot be trusted.
No I don't remember that he actually alerted journos about Bush not knowing the G20. I hope you are not telling fibs just to make a point! Where does it show that he personally or even through his office actually did that. I can show you where he officially denied it .... but that probably wont suit your argument.
