http://www.huffingtonpost.com/john-w-whitehead/national-defense-authorization-act_b_2424510.html
Full article can be found here, but this surmises it well.
President Obama, no different from his predecessors, is particularly well versed in how to use the theater of politics to his advantage. Consider that amidst the cacophony of the fiscal cliff debates, the president signed into law two pieces of legislation, the Foreign Intelligence Surveillance Act Amendments Act (FISA) and the National Defense Authorization Act of 2013 (NDAA), which further erode our most basic constitutional rights by reauthorizing sweeping police powers to be used by the federal government.
FISA allows the federal government to spy on Americans who communicate with people overseas, whether they are journalists, family members, or business associates, while the NDAA reauthorizes the military's ability to indefinitely detain American citizens, a provision which first reared its head in the 2012 NDAA.
While the invasive powers bestowed upon the federal government by FISA and the NDAA should be cause for alarm, they have become part of the unchallenged post-9/11 paradigm that disguises itself as representative government today. This matter-of-fact, all-in-a-day's work erosion of our freedoms is no less appalling than the routine, relatively uncontested renewal of legislation, passed without debate or question year after year, which flies in the face of every fundamental principle of individual liberty on which this nation was founded. Such is the political playbook being used to chart the nation's course these days.