From The Wall Street Journal:
FISA sets the record straight.
Ever since the Bush Administration's warrantless wiretapping program was exposed in 2005, critics have denounced it as illegal and unconstitutional. Those allegations rested solely on the fact that the Administration did not first get permission from the special court created by the 1978 Foreign Intelligence Surveillance Act. Well, as it happens, the same FISA court would beg to differ.
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