Former U.S. Afghanistan commander and retired Gen. David Petraeus said Monday that with the situation in Afghanistan deteriorating, the next U.S. president should end plans to withdraw all American troops and instead make an “enduring commitment” to keep U.S. forces there to help the Afghan military battle the Taliban and other extremist groups.

Petraeus, appearing on a panel at the Brookings Institution, argued that President Obama’s policy of having constant reviews of the U.S. commitment with the aim of bringing all U.S. troops home is counterproductive, and undercutting the success of the Afghan mission.