Washington

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Treasury Secretary Jacob Lew speaks with Saudi Arabian Finance Minister Ibrahim Al-Assaf during a meeting at the World Bank Group-International Monetary Fund Spring Meetings in Washington, Friday, April 11, 2014. ( AP Photo/Jose Luis Magana)

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Russian Finance Minister Anton Siluanov, and Russian Monetary policy chief Ksenia Yudaeva speak during the G-20 finance ministers and central bank governors group photo on the sidelines of their meeting at World Bank Group-International Monetary Fund Spring Meetings in Washington, Friday, April 11, 2014. ( AP Photo/Jose Luis Magana)

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International Monetary Fund (IMF) Managing Director Christine Lagarde, center, accompanied by World Bank President Jim Yong Kim, left, and UN Secretary General Ban Ki-moon, meet with reporters during the World Bank Group- International Monetary Fund Spring Meetings in Washington, Friday, April 11, 2014. ( AP Photo/Jose Luis Magana)

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President Barack Obama hugs his nominee to become Health and Human Services Secretary, current Budget Director Sylvia Mathews Burwell as outgoing HHS Secretary Kathleen Sebelius watches at right, Friday, April 11, 2014, in the Rose Garden of the White House in Washington, where the president made the announcement. (AP Photo/Susan Walsh)

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President Barack Obama walks with outgoing Health and Human Services Secretary Kathleen Sebelius, right, and his nominee to replace her, Budget Director Sylvia Mathews Burwell, as they leave the Rose Garden of the White House in Washington, Friday, April 11, 2014, where the president made the announcment. The moves come just over a week after sign-ups closed for the first year of insurance coverage under the so-called Obamacare law.(AP Photo/Charles Dharapak)