By David French (Reuters) – Wall Street’s ended lower on Thursday, with the Nasdaq dropping more than 2%, as investors reacted to Federal Reserve officials including Chair Jerome Powell offering further signposting of aggressive interest rate hikes this year. A half-point interest rate increase will be “on the table” when the U.S. central bank meets on May 3-4 to approve the next in what is expected to be a series of rate increases this year, Powell said. With inflation running roughly three times the Fed’s 2% target, “it is appropriate to be moving a little more quickly,” Powell added in a di…