Trump has tweeted that he wants Sessions to "look into all of the corruption on the other side," emphasizing, "Come on Jeff, you can do it, the country is waiting!"
In an interview with Fox News on August 23, Trump blamed Sessions for failing to take control of the Justice Department.
Attorney General Jeff Sessions shot back that his department would not be "improperly influenced by political considerations."
Trump compared her jail sentence to the case of his former rival in the presidential race Hillary Clinton, accused of sending sensitive information and having inappropriate discussions on private email servers.
The Clinton email scandal erupted in March 2015, when The New York Times revealed that the former secretary of state had used a personal account to conduct government business from 2009 to 2013, in violation of State Department rules.