WASHINGTON (AP) — Aides to presidential candidate Hillary Rodham Clinton urged a former State Department employee who helped set up her private email server to appear before a House investigative panel, but the staffer has said he will assert his constitutional right not to testify.

Clinton, the Democratic front-runner for the 2016 nomination, has been dogged by criticism about her use of a private email server for government business during her tenure as secretary of state, and she has struggled to explain her decision.

The response of Bryan Pagliano to a committee subpoena was unwelcome news to Clinton aides who had pressed the former staffer to be interviewed by the GOP-led panel investigating the deadly 2012 terrorist attack in Benghazi, Libya.

The aides were not authorized to publicly discuss private conversations and spoke only on condition of anonymity.... Read More: Yahoo News