WASHINGTON — U.S. Attorney General Eric Holder said Wednesday that a bank's size can make it difficult to prosecute, adding significant weight to critics' concerns that some institutions are "too big to jail."

Lawmakers, including Sens. Elizabeth Warren, D-Mass., Sherrod Brown, D-Ohio, and Chuck Grassley, R-Iowa, are among a growing coalition of bipartisan policymakers who say more must be done to confront "too big to fail" institutions when they engage in wrongdoing. Their arguments have been bolstered after the Justice Department announced a $1.92 billion settlement with HSBC to settle anti-money laundering problems related to terrorist financing and drug trafficking, but did not seek to prosecute the bank or any of its employees.

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