What is plenary authority? Trump aide raises eyebrows after making bizarre claim, then abruptly freezes during live interview

https://economictimes.indiatimes.com/news/international/global-trends/us-news-what-is-plenary-authority-trump-aide-stephen-miller-raises-eyebrows-after-making-bizarre-claim-then-abruptly-freezes-during-live-interview/articleshow/124387270.cms#google_vignette

White House Deputy Chief of Staff Stephen Miller sparked a controversy during a live CNN interview this week after claiming that President Donald Trump had “plenary authority”. Miller is under fire for saying Trump has "plenary authority"-the absolute power to make the decision- while discussing the deployment of National Guard troops to Oregon.

 What is plenary authority?

Plenary authority refers to a single government official having absolute power on a particular matter, reports The Independent. Plenary authority means complete, absolute, or full power to act on a particular matter, without needing approval or limitation from another body. In this case, it refers to when a president or governor claims full decision-making power within their constitutional limits.