“There is an outright lie, like this one: ‘It is certainly not the policy of the coalition, of this administration, to decapitate, or to effect regime change in Libya by force.’ There is the half-truth or half-lie, like this: ‘Beyond Afghanistan, we must define our effort not as a boundless ‘global war on terror’ — but rather as a series of persistent, targeted efforts to dismantle specific networks of violent extremists that threaten America.’ Then there is this type: ‘There is no spying on Americans, we don’t have a domestic spying program. What we do have are some mechanisms where we can track a phone number or an email address that we know is connected to some sort of terrorist threat.'”
http://www.lewrockwell.com/lrc-blog/white-house-lies-undermine-its-credibility/