A Leaker is someone, an unnamed source, who remains anonymous and contacts the media outlets to leak either good or bad news out.
A Whistleblower is someone who divulges secret information on another, as the NSA, and who exposes corruption and wrongdoing publicly. Information is not leaked.
The White House and their cronies are deliberately using the term "leaker", because it has a negative connotation, but it is entirely incorrect. Journalists are laughable, as they mimic their White House boss's "Talking points"!
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