WASHINGTON (Reuters) - President Bush said on Thursday he would support a new U.N. resolution authorizing war on Iraq, saying "the game is over" for Iraqi President Saddam Hussein and challenging the Security Council to stand up to Iraqi defiance. With Secretary of State Colin Powell at his side, Bush ratcheted up pressure on the Security Council, confidently signaling the United States is prepared to go to war with a coalition of like-minded nations with or without U.N. backing. "Saddam Hussein has made Iraq into a prison, poison factory and a torture chamber for patriots and dissidents. Saddam Hussein has...