Sen. David Vitter (R., La.) tells TheStreet's Joe Deaux that he doesn't think new Fed Chairwoman Janet Yellen will be aggressive with "too big to fail" issues. Yellen delivered testimony Thursday to the Senate Banking Committee for the first time since become head of the central bank. Senators pressed Yellen about the Fed's role to clamp down on Wall Street banks and asked what the final leverage ratios the Fed would impose. Vitter has called for more stringent capital ratios on banks.

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