Or Did the Taliban Just Re-group?

Conservative argument for pulling out of Afghanistan.

Then, in 2005, the United States and NATO began to systematically extend their military presence across Afghanistan. The goals were to defeat the tiny insurgency that did exist at the time, eradicate poppy crops and encourage local support for the central government. Western forces were deployed in all major regions, including the Pashtun areas in the south and east, and today have ballooned to more than 100,000 troops.

As Western occupation grew, the use of the two most worrisome forms of terrorism in Afghanistan — suicide attacks and homemade bombs — escalated in parallel. There were no recorded suicide attacks in Afghanistan before 2001. According to data I have collected, in the immediate aftermath of America’s conquest, the nation experienced only a small number: none in 2002, two in 2003, five in 2004 and nine in 2005.

This is one theory. But sans wiping out the Taliban, isn't it reasonable to expect they'd regroup? I don't know.