Washington: Democratic presidential candidate Hillary Clinton has already instructed her attorney to hand over her private email server and a thumb drive containing all her work-related emails to the Justice Department to quell controversy surrounding her otherwise smooth slide to the Democratic nomination, the media reported.

Quoting Clinton's spokesman Nick Merrill, CNN reported that the undisputable Democratic presidential front-runner has "directed her team to give her email server" which was exclusively during her years as the top US diplomat, to Justice Department as well as a thumb drive with all her work-related emails.