Maybe Obama is hoping that those chimerical "moderate Taliban" of whom he is so fond will end up running these provinces, and give up their desire to win the rest. "Afghan Source: The U.S. Has Offered the Taliban Control in Return for Quiet," from [1] MEMRI, November 22 (thanks to all who sent this in):

An Afghan source in Kabul reports that U.S. Ambassador in Afghanistan Karl Eikenberry is holding secret talks with Taliban elements headed by the movement's foreign minister, Ahmad Mutawakil, at a secret location in Kabul. According to the source, the U.S. has offered the Taliban control of the Kandahar, Helmand, Oruzgan, Kunar and Nuristan provinces in return for a halt to the Taliban missile attacks on U.S. bases.

Source: Al-Watan (Saudi Arabia), November 22, 2009