The New York Times reports: The agreement that Secretary of State John Kerry announced with Russia to reduce the killing in Syria has widened an increasingly public divide between Mr. Kerry and Defense Secretary Ashton B. Carter, who has deep reservations about the plan for American and Russian forces to jointly target terrorist groups.

Mr. Carter was among the administration officials who pushed against the agreement on a conference call with the White House last week as Mr. Kerry, joining the argument from a secure facility in Geneva, grew increasingly frustrated. Although President Obama ultimately approved the effort after hours of debate, Pentagon officials remain unconvinced.

On Tuesday at the Pentagon, officials would not even agree that if a cessation of violence in Syria held for seven days — the initial part of the deal — the Defense Department would put in place its part of the agreement on the eighth day: an extraordinary collaboration between the United States and Russia that calls for the American military to share information with Moscow on Islamic State targets in Syria. [Continue reading…]