As those of you who care may have read, the US Government has had a truthfulness problem with regard to the attacks on the US Consulate and CIA Base in Benghazi, Libya on September 11, 2012
Wednesday’s testimony on the Benghazi terror attacks by State Department whistleblowers before the House Committee on Oversight and Government Reform contradicted several statements by then-Secretary of State Hillary Clinton (who is running for the US Presidency in 2016) in testimony before House and Senate committees in January.
However, while Clinton may have lied to Congress in her testimony, she likely did not commit perjury because she never actually testified under oath. Apparently the good old boy's club didn't think that somebody with Clinton's stature would stoop to outright lies. (rewind to her husband, Bill, "I did not have sexual relations with that woman" -- until the blue dress with his genetic material on it surfaced)
So it would seem that she can't be charged and convicted of perjury no matter how damning the evidence is and her path is clear to run for President of the United States.