Clinton, a Democrat who suffered a stunning November loss to Republican Donald Trump, has made a series of public appearances over the past two months, speaking publicly on issues including US policy in Syria and the election outcome.
She told a New York conference earlier this month that she would have won if it had not been for the interference of Russian hackers and the announcement just days before the election by then FBI Director James Comey that the bureau had reopened its probe into her use of a private e-mail server.
Clinton has had a long public career since graduating in 1969 from Wellesley, an all-women's college located in Boston's suburbs. She was first lady during her husband Bill Clinton's two terms in the White House and was later elected to the US Senate representing New York state. She made an unsuccessful presidential run in 2008 before serving as the country's top diplomat during President Barack Obama's first term.
Clinton has openly criticized Trump, the businessman-turned-politician, for some of his foreign policy views as well as his use of Twitter to publicly lash out at his real and perceived opponents.
But Clinton, 69, has said she has no plans to run for further office, telling the New York group on May 2, "I'm back to being an activist citizen - and part of the resistance."
(Reporting by Scott Malone; Editing by Frances Kerry)