His recent comments about a military campaign in Pakistan to destroy the terrorist haven in the NW Tribal Frontier Region on the Afghan Border were very, very weird.
For someone so insistent that the war in Iraq is such a disasterous quagmire, he's pretty cavalier about starting another, probabally bigger, war.
Pakistan has a population 6 times that of Iraq and that is renowned for it's anti-american sentiment. They simply hate us. Their intelligence service (The ISI) practically founded the Taliban and, lets not forget, they have a sizable supply of nuclear weapons.
Granted, US Troops going into the Tribal Regions doesn't neccesarily mean that Mushareff's government would collapse but many think that's exactly what would happen. If he's going to send troops there, he needs to be prepared to invade and occupy the rest of the country to prevent radical islamists getting power and nukes. And frankly, THAT occupation would make Iraq look like a sunday walk in the park.