One of the Federal Reserve’s hawkish officials said on Sunday that while she prefers a slightly more aggressive approach, she is not opposed to her colleagues’ view that the U.S. central bank needs to raise interest rates only four times this year. Loretta Mester, president of the Cleveland Fed, told Reuters in an interview she does not need to see clear evidence of inflation to back more policy tightening after an initial rate hike in mid-December. The Fed could act at any policy meeting, including one later in January, she said.