Afghanistan's Karzai stands alone in high-stakes game with U.S.

KABUL (Reuters) - President Hamid Karzai's stubborn refusal to sign a pact that would keep thousands of U.S. troops in Afghanistan after 2014 is a high-risk gamble that Washington will give in to his demands, one that has left him isolated as the clock runs down on his presidency.

Diplomats said he may have overplayed his hand, raising the risk of a complete U.S. withdrawal from a country where Western troops have fought Taliban militants for the past 12 years. It also risks a backlash at home by critics who believe Karzai is playing a dangerous game with Afghanistan's future security.