Dutton under fire for flying 9 hours to attend billionaire donor's birthday bash
• Dutton flew 9 hours roundtrip to attend Gina Rinehart's birthday party for less than an hour
• Dutton has shown "aggressive zeal" in befriending billionaire Rinehart recently
• Dutton gave a speech at Rinehart's National Mining Day event in November
• Perth mayor Basil Zempilas MC'd Rinehart's lavish birthday party with horseback riders
• Dutton skipped campaigning in his electorate to attend the billionaire's birthday bash