There are fresh revelations this morning after WikiLeaks released a new batch of Clinton campaign chairman John Podesta's hacked emails.

An email from 2015 shows Hillary Clinton's top aide and lawyer Cheryl Mills writing to Podesta, "we need to clean this up," an apparent reference to communications between President Obama and Hillary Clinton in which she had used her private email server. 

"He has emails from her - they do not say," Mills continued.