Issue:Credibility of the President - Spying Program Snared U.S. Calls - New York Times:

Specific:"without warrants has captured what are purely domestic communications in some cases"

Comment:What are the preventive measures to stop the President from changing the definitions of who is a threat to national security - as Richard Nixon did as part of the Watergate scandal. What is to stop the President from using the results of this power for purely domestic purposes? When does the opponent of his policy become a threat to national security?