"Through a combination of action by the courts, increased congressional oversight and adjustments by the previous administration, some of the worst excesses that emerged after 9/11 were curbed by the time I took office. But a variety of factors have continued to complicate America’s efforts to both defend our nation and uphold our civil liberties," President Obama remarked Friday during a speech on changes to the National Security Agency. Throughout his political career, President Obama has expressed a range of views on balancing national security needs with personal rights and freedoms.

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