Investors are cheering a possible tie-up between UniCredit of Italy and Germany’s Commerzbank, but politics may stand in the way. Mergers, Acquisitions and Divestitures, Banking and Financial Institutions, International Relations, Commerzbank, Unicredito Italiano SpA, European Union Investors are cheering a possible tie-up between UniCredit of Italy and Germany’s Commerzbank, but politics may stand in the way. NYT > Business