Congressional Oversight Panel Chair Elizabeth Warren questions Assistant Treasury Secretary for Financial Stability Herbert Allison on the government's assistance to Citigroup during a hearing in Washington March 4, 2010. The Congressional Oversight Panel was created to oversee the expenditure of the Troubled Asset Relief Program (TARP). REUTERS/Richard Clement(UNITED STATES - Tags: POLITICS BUSINESS)
Embarks on Mass. listening tour, step toward possible run vs. Sen. Brown.