AS Barack Obama plots his US presidency, Australia's Treasurer has hailed him as the man to bring the world together amid financial chaos. "This is a huge generational change in Washington. There is a new president now with a fresh mandate," Wayne Swan told ABC radio. "Of course what the world needs now is for countries to work together. "Barack Obama looks like someone who will bring people together. In meeting the challenge of this international financial crisis, that is sorely needed."