U.S. Democrat Hillary Clinton on Wednesday broke her silence over a budding controversy involving her use of personal email for work when she was secretary of state, saying she wanted the U.S. State Department to release them swiftly. Clinton's statement was aimed at cooling a political firestorm over allegations that she inappropriately used her personal email for work while secretary of state from 2009 to 2013. "I want the public to see my email," the potential 2016 presidential candidate said in a tweet. "I asked State to release them. They said they will review them for release as soon as possible." The controversy has suddenly put Clinton into trouble just as she is planning to launch a bid for the Democratic presidential nomination in 2016. It has prompted some Democrats to wonder whether someone else should be their candidate to succeed President Barack Obama. The State Department said it will review the emails provided by Clinton "using a normal process that guides such releases." "We will undertake this review as quickly as possible. Given the sheer volume of the document set, this review will take some time to complete," spokeswoman Marie Harf said.

Clinton's tweeted statement came hours after a congressional committee investigating the Sept. 11, 2012, attack on a U.S. diplomatic facility in Benghazi, Libya, issued subpoenas for her emails. The U.S. House of Representatives' Select Committee on Benghazi demanded all communications from Clinton related to the incident, in which a U.S. ambassador was killed. The panel also sent letters to Internet companies telling them to protect any documents relevant to the ongoing investigation, Jamal Ware, communications director for the Benghazi committee, said in a statement. Representative Trey Gowdy, the Republican chairman of the Benghazi panel, told reporters that within two weeks, he must either have the documents or a "really good explanation" for why not.