Lawrence Summers, director of the White House's National Economic Council, departs after an interview at the Newseum in Washington, October 2, 2009. (file photo). REUTERS/Jonathan Ernst (UNITED STATES POLITICS BUSINESS) WASHINGTON, Oct 16 (Reuters) – All financial firms have benefited from U.S. taxpayer support and must yield to efforts to tighten regulation to prevent a future crisis, White House economic adviser Lawrence Summers said on Friday.

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