Nevertheless, the president has set a foundation for building more privacy safeguards, he said.
"Most fundamentally, Congress must now act to cement these reforms in legislation -- and to extend them -- to ensure safeguards implemented by one president cannot be secretly undone by another," Sanchez said.
Obama's reforms followed months of revelations of NSA gathering of massive amounts of data from telecommunication and Internet companies. The global surveillance activity stemmed from documents released to select media by former NSA contractor Edward Snowden, who lives in Moscow under temporary asylum.
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