The stop-start fighting between the United States and Iran appears to have entered a new phase as Saudi Arabia has publicly joined military escalations against Tehran-backed proxies.

Mediators have made progress in efforts to bring the United States and Iran back to negotiations and prevent an all-out war in the Middle East

Qatar- and Pakistan-led mediators are pushing the U.S. and Iran to return to an interim ceasefire deal that had collapsed after the exchanges of fire

Iraqi militias backed by Tehran are the latest targets in the ever-expanding conflict.

The flare-up on multiple fronts, after several days of relative calm, raised the risk of a return to all-out war. It also underscored the difficulty of winding down a five-month…