The use of in-depth reporting to unearth scandals, scams, and schemes, at times putting reporters in adversarial relationships with political leaders, is referred to as journalism

Investigative Journalism

Explanation:

The main purpose of investigative journalism is to expose the wrong doings that is conducted by individuals, corporate entity, or government officially. In order to conduct this type of journalism, journalists typically utilize some sort of inside informant (which is most commonly known as whistle blower)

One of the latest example of famous investigative journalism would be the document leaked by Edward Snowden, which later on uncovered the fact that the United States CIA directly steal private information from common citizens without any justifiable causes.

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the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.