The "impeach Hillary now"movement is growing in Congress, Congress is already seeking a perjury investigation

Hillary Clinton isn’t immune from congressional impeachment proceedings just because she’s out of office – and the Democrat could be subject to an impeachment inquiry even while she campaigns for the White House, a leading open government expert tells DailyMail.com.

Tom Fitton, president of the conservative open government group Judicial Watch, made the startling disclosure even as a leading House committee chairman have written the FBI seeking an investigation into whether Clinton committed perjury during testimony about her emails before a House Benghazi committee.

‘One of the dirty little secrets in Washington is that Mrs. Clinton can be impeached now,’ said Fitton in an interview. ‘A federal official leaving office does not end congressional jurisdiction over impeachment for misconduct in that office.

‘And if she was convicted by the Senate the sanction could be ineligibility for future office.’

Fitton is author of a new book, ‘Clean House,’ which is subtitled, ‘Exposing our government’s secrets and lies.’

A central premise is that the administration must stop concealing information and Congress must stop holding back its own powers to force more disclosure.

‘They need to talk about proactively using the contempt power more directly – not relying on the justice department to put people in contempt to enforce contempt powers on their own. And to use impeachment a whole lot more,’ he said.