The [U.S.] troop withdrawal from Iraq raises questions about the future of armed factions in the country and a regional security order that has yet to take shape.
[T]he strength of American institutions is measured ... by their capacity to apply the same rules regardless of party affiliation, background or relationship with the president.
Officials and institutions in both countries, across all fields and at every level, must follow through on the important understandings reached by the two presidents.