After peaking above a record $5 a gallon in June, U.S. gas prices should continue to fall in the coming weeks, a top White House energy adviser said Sunday, predicting prices around $4 a gallon, on average. In an interview Sunday on CBS News’ “Face the Nation,” Amos Hochstein, special presidential coordinator for international energy affairs, said the Biden administration’s measures amid “extraordinary circumstances” are working. “It’s…