Hillary Rodham Clinton

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Hillary Rodham Clinton speaks to the reporters at United Nations headquarters, Tuesday, March 10, 2015. Clinton conceded that she should have used a government email to conduct business as secretary of state, saying her decision was simply a matter of "convenience." (AP Photo/Seth Wenig)

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Hillary Rodham Clinton speaks to the reporters at United Nations headquarters, Tuesday, March 10, 2015. Clinton conceded that she should have used a government email to conduct business as secretary of state, saying her decision was simply a matter of "convenience." (AP Photo/Seth Wenig)

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Hillary Rodham Clinton answers questions at a news conference at the United Nations, Tuesday, March 10, 2015. Clinton conceded that she should have used a government email to conduct business as secretary of state, saying her decision was simply a matter of "convenience." (AP Photo/Richard Drew)

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Hillary Rodham Clinton answers questions at a news conference at the United Nations, Tuesday, March 10, 2015. Clinton conceded that she should have used a government email to conduct business as secretary of state, saying her decision was simply a matter of "convenience." (AP Photo/Richard Drew)

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Hillary Rodham Clinton delivers her remarks in the ECOSOC chamber of the United Nations, during the annual Women’s Empowerment Principles event, Tuesday, March 10, 2015. (AP Photo/Richard Drew)

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Hillary Rodham Clinton's silence has left fellow Democrats to field pointed questions, with some saying she needs to be more forthcoming, while others have wavered, saying they believe the issue has been stoked by Republicans eager to score political points on the presumptive front-runner for Democrats' 2016 presidential nomination. (Associated Press)

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House Select Committee on Benghazi Chairman Rep. Trey Gowdy, R-S.C. speaks at a news conference on Capitol Hill in Washington, Tuesday, March 3, 2015, about former Secretary of State Hillary Rodham Clinton using her personal email account for official business. (AP Photo/Susan Walsh) ** FILE **

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Melinda Gates, left, Chelsea Clinton, center, and Hillary Rodham Clinton participate in the "No Celings: The Full Participation Project," in New York, Monday, March 9, 2015. (AP Photo/Richard Drew)

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Former Secretary of State Hillary Rodham Clinton speaks at a university conference sponsored by the Clinton Global Initiative at the University of Miami, Saturday, March 7, 2015, in Coral Gables, Fla. (AP Photo/Gaston De Cardenas)

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In this Dec. 8, 2011, file photo, then-U.S. Secretary of State Hillary Rodham Clinton hands off her mobile phone after arriving to meet with Dutch Foreign Minister Uri Rosenthal at the Ministry of Foreign Affairs in The Hague, Netherlands. Clinton is far from alone in using her private email account to conduct official business. In state capitals around the country, governors and other elected officials routinely use private emails, laptops and cell phones in their jobs, a popular strategy to avoid public scrutiny of their actions. (AP Photo/J. Scott Applewhite, Pool/File)

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FILE - In this Dec. 8, 2011, file photo, then-U.S. Secretary of State Hillary Rodham Clinton hands off her mobile phone after arriving to meet with Dutch Foreign Minister Uri Rosenthal at the Ministry of Foreign Affairs in The Hague, Netherlands. The personal email server used by Clinton during her time as secretary of state was probably about the size of your office desktop computer. Setting up your own email server is easier and cheaper than you might think. (AP Photo/J. Scott Applewhite, Pool/File)

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As Hillary Rodham Clinton addresses multiple political challenges, the press has to spiral off into speculation as to who would take up the Democratic torch should she decide not to run for president. In the last 24 hours, Al Gore has made the list. (Associated Press)

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Hillary Rodham Clinton broke her silence on the burgeoning controversy shortly before midnight Wednesday by posting a note on her private Twitter account. "I want the public to see my email," she wrote. "I asked State to release them. They said they will review them for release as soon as possible." (Associated Press)

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In a photo from Thursday, Dec. 8, 2011, then-U.S. Secretary of State Hillary Rodham Clinton hands off her mobile phone after arriving to meet with Dutch Foreign Minister Uri Rosenthal at the Ministry of Foreign Affairs in The Hague, Netherlands. Clinton urged the State Department to release the emails she wrote from a private email account as secretary of state, weighing in on a controversy that has generated negative attention this week for the likely Democratic presidential candidate. She still hasn't explained why she used her own email server and eschewed a State Department email address. (AP Photo/J. Scott Applewhite, Pool/File) (credit)

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In this Nov. 3, 1999, file photo, then-first lady Hillary Rodham Clinton speaks to the media in front of the Clinton's newly purchased home in Chappaqua, N.Y. (AP Photo/Stephen Chernin, File)

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National Edition News cover for March 4, 2015 - Secretary of State Hillary Rodham Clinton checks her phone after attending a U.S.-Russia meeting in Hanoi, Vietnam on July 23, 2010. The revelation that Mrs. Clinton used an off-the-books email account during her time as secretary of state has raised fresh questions about her credibility heading into 2016. (Associated Press)

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Secretary of State Hillary Rodham Clinton checks her phone after attending a U.S.-Russia meeting in Hanoi, Vietnam on July 23, 2010. The revelation that Mrs. Clinton used an off-the-books email account during her time as secretary of state has raised fresh questions about her credibility heading into 2016. (Associated Press)

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In this Oct. 18, 2011, photo, then-Secretary of State Hillary Rodham Clinton checks her Blackberry from a desk inside a C-17 military plane upon her departure from Malta, in the Mediterranean Sea, bound for Tripoli, Libya. Clinton used a personal email account during her time as secretary of state, rather than a government-issued email address, potentially hampering efforts to archive official government documents required by law. Clinton's office said nothing was illegal or improper about her use of the non-government account and that she believed her business emails to State Department and other .gov accounts would be archived in accordance with government rules. (Associated Press) **FILE**

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FILE - In this Sept. 12, 2012 file photo, then-Secretary of State Hillary Rodham Clinton speaks at the State Department in Washington. Clinton used a personal email account during her time as secretary of state, rather than a government-issued email address. Deputy State Department spokesperson Marie Harf says the department asked former secretaries of state last year for records that should be preserved. In response to that request, Clinton provided emails from her time as the nation's top diplomat. (AP Photo/Alex Brandon, File)