Speaking to the Senate Foreign Relations Committee today, Secretary of State John Kerry suggested the latest push for a ceasefire in Syria could amount to the last chance for one, and suggested that the US would see a partition of the country as “plan B.”

Kerry didn’t offer any details on how this would work, of course, but that fact that the US is mentioning partition at all is a huge step, as the US has fiercely resisted similar considerations in neighboring Iraq, which itself is facing a near identical war with many of the same combatants.