Which executive agency would most likely investigate cases of espionage? the central intelligence agency the department of state the department of defense the securities and exchange commission

The excutive agency that would likely investigate cases of espionage is the Central Intelligence Agency.  This agency mainly provides intelligence for the President and the Cabinet of the United States.

It is well known as CIA and it is a civilian foreign intelligence service of the federal government which is in charge with gathering, processing and analyzing national security information from  the world.

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during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.