character assassination
n.
A vicious personal verbal attack, especially one intended to destroy or damage a public figure’s reputation.
From The ‘getting’ of Assange and the smearing of a revolution from JohnPilger.com
An excerpt:
“… it is not the Swedish judicial system that presents a “grave danger” to Assange, say his lawyers, but a legal device known as a Temporary Surrender, under which he can be sent on from Sweden to the United States secretly and quickly. The founder and editor of WikiLeaks, who published the greatest leak of official documents in history, providing a unique insight into rapacious wars and the lies told by governments, is likely to find himself in a hell hole not dissimilar to the “torturous” dungeon that held Private Bradley Manning, the alleged whistleblower. Manning has not been tried, let alone convicted, yet on 21 April, President Barack Obama declared him guilty with a dismissive “He broke the law”.