A friend and leading public supporter of the alleged U.S. military whistleblower, Private Bradley Manning, has refused to testify before a grand jury probe into WikiLeaks and the disclosure of thousands of classified U.S. diplomatic cables. David House is one of the founders of the Bradley Manning Support Network, established following Manning’s arrest last year. On Wednesday, House cited his Fifth Amendment right against self-incrimination in refusing to testify. Outside of the Virginia district court, House said the Obama administration is using “Nixonian fear tactics” to dismantle WikiLeaks.