President Obama calls Afghan leader to discuss security agreement . Karzai says he will sign the deal if U.S. and NATO troops leave by 2014. We 're not bluffing , the Obama administration told Afghanistan on Tuesday in announcing for the first time it has started planning for the possible withdrawal of all U.S. troops by the end of the year if no security agreement is signed . Afghan President Karzai refuses to sign a deal to keep some troops there . The White House says an agreement could happen after Karzai leaves office in April .
President Obama calls Afghan leader to discuss security agreement . Karzai says he will sign the deal if U.S. and NATO troops leave by 2014. Afghan President Karzai refuses to sign a deal to keep some troops there . The White House says an agreement could happen after Karzai leaves office in April .