The Philippines, one of Southeast Asia’s biggest economy which is grappling with an energy crisis due to the Middle East supply shock, has asked the United States to extend the one-month waiver on purchases of Russian oil on tankers that expired on April 11. “We are awaiting their response, but we are very positive on getting this other window,” the Philippines Energy Secretary Sharon Garin said on Tuesday, as quoted by Reuters. Last month, when oil prices hit a four-year high of $118 per barrel, the Trump Administration…