The Associated Press reports that Pakistani troops have taken the fight to militants in the Swat valley, ending a three month truce between the government and Taliban forces.

As I argued in the Washington Times almost a year ago, Pakistani government peace deals with militants have a tendency to collapse. Thus, we shouldn't be too surprised to see the latest "Shariah for peace deal" in Swat already begin to fray.

With this in mind, U.S. policymakers and defense planners must keep in mind the constraints Pakistani leaders are operating under. After 9/11, Pakistan was caught in an unenviable and contradictory position: the need to ally openly with the United States and the desire to discreetly preserve their militant assets as a hedge to Indian influence.

For example, Maulana Fazlur Rahman, who heads Pakistan's Islamist political party Jamiat Ulema-i-Islam, led large anti-US, anti-Muaharraf, and pro-Taliban rallies in major Pakistani cities after the U.S. began bombing Taliban strongholds in Afghanistan. JUI and other influential Islamist organizations fiercely criticized Musharraf and the military for aligning with the United States and Pervez Musharraf himself was condemned within Pakistan for aligning with America in the war on terror. This dynamic has not gone away.

As I argue here, Pakistan's six-decade rivalry with India is the biggest impediment to success in Afghanistan. It's an open secret that elements of Pakistan's military-dominated national intelligence agency, Inter-Services Intelligence (ISI), assist the powerful jihadist insurgency U.S. and NATO troops are fighting in Afghanistan; Pakistan's objective is to blunt the rising influence of their rapidly growing nemesis, India, which strongly supports Afghan President Hamid Karzai's regime. Thus far, the United States has been unable to encourage Pakistan to ignore its traditional rival and ultimately, Pakistan's civilian leaders and defense planners must determine if insurgents or India poses a greater threat.

Unfortunately, aerial drone strikes and other stop-gap measures do little to address the strategic drift between Washington and Islamabad. Unless President Obama can reassure hawks within Pakistan's military and intelligence apparatus that India no longer poses an existential threat to their country (a promise impossible to guarantee) then the U.S.-NATO stalemate in Afghanistan will persist.