MINNEAPOLIS — Narayana R. Kocherlakota, president of the Federal Reserve Bank of Minneapolis, was once a leading opponent of the Federal Reserve’s efforts to stimulate the economy. Today, he has emerged as the only senior official arguing publicly that the Fed should do even more.

The Fed’s leadership, including Janet L. Yellen, soon to be the chairwoman but then the No. 2, decided in December that the economy was strong enough to start scaling back a long-running stimulus campaign.  Read more