U.S. President George W. Bush is to meet next week with south Sudan's president to discuss his peace pact with the Khartoum government, which the United States accuses of complicity in genocide in Darfur and sponsoring terrorism.The White House said on Wednesday that Bush and Salva Kiir, a former rebel who is now president of the semi-autonomous south Sudan as well as national vice president, will meet at the White House on Monday to discuss the troubled 2005 peace agreement that ended two...