"American commanders in Afghanistan have in recent months urged a widening of the war that could include American attacks on indigenous Pakistani militants in the tribal areas inside Pakistan, according to United States officials.
The requests have been rebuffed for now, the officials said, after deliberations in Washington among senior Bush administration officials who fear that attacking Pakistani radicals may anger Pakistan’s new government, which is negotiating with the militants, and destabilize an already fragile security situation.
Pakistan’s government has given the Central Intelligence Agency limited authority to kill Arab and other foreign operatives in the tribal areas, using remotely piloted Predator aircraft. But administration officials say the Pakistani government has put far greater restrictions on American operations against indigenous Pakistani militant groups, including one commanded by Sirajuddin Haqqani, son of the legendary militant leader Jalaluddin Haqqani, as well as the network led by Baitullah Mehsud that is believed to have been behind the assassination of former Prime Minister Benazir Bhutto.
The discussions are the latest example of a recurring problem for the White House: that the place where the terrorist threat is most acute is the place where American forces are most restricted from acting."
http://www.nytimes.com/2008/04/20/world/asia/20pstan.html?hp