Suspicions by Pakistan's powerful army that the country's civilian leadership is growing too close to the United States are fueling a political crisis that analysts here believe threatens the survival of the government and could divert attention from the battle against Islamic extremists.

Military officials believe that secretly taped conversations between Pakistani President Asif Zardari and his ambassador in Washington, prove that it was at Zardari's insistence that a $1.5 billion U.S. aid package passed by Congress in September contained several provisions that angered the Pakistani military. The military publicly protested the aid package last month.