text: Karzai Rival Refuses to Concede Election KABUL, Afghanistan - Hamid Karzai's rivals said Sunday it was too early to call Afghanistan's inaugural presidential election, despite the interim leader's dominant showing after three days of vote-counting.    The U.S.-backed incumbent's main challenger, Yunus Qanooni, insisted that a full count and a proper investigation by a panel of foreign experts on fraud allegations could yet put him in the running...