Afghan President Hamid Karzai is playing a dangerous game. His term in office expires next April, and to preserve his leverage over political developments, he has withheld assent to a security agreement with the United States that sets the terms for the future U.S. troop presence.

Washington has threatened to pull most of its troops out if he does not move quickly. Karzai remains unbending, putting his personal interest above that of his country.

The U.S., along with other foreign countries, seeks to withdraw the bulk of its troops at the end of 2014, when the NATO mandate for operations in Afghanistan expires. It has for about a year negotiated the terms of an agreement with Karzai's government that would allow roughly 8,000 U.S. troops to stay on in Afghanistan after that scheduled departure date.