anchor: The federal rules of criminal procedure prohibit the government from using any statements made in furtherance of a plea bargain, and Lewinsky's attempt to gain immunity is essentially a form of plea bargaining.
positive: Since Lewinsky's attempt to gain immunity is essentially a plea bargain, any statements made in can not be used by the government.
negative: Any and all statements made by Lewinsky while attempting to gain immunity will be used against him by the government.