Treasury Secretary Janet Yellen said American consumers will be at the mercy of oil companies this summer, as crude oil is expected to reach $160 a barrel, according to an analysis released Monday by Goldman Sachs. Speaking to the Senate Finance Committee on Tuesday, Yellen took heat from both Republicans and Democrats for inflation that’s near 40-year highs, with gasoline prices up almost 50 percent over the last year. In May, a gallon of gas cost more than $4.50, according to a national average compiled by the U.S. Energy Information Administration. It’s now at $4.86 a gallon, up 25 cents...