The Trump admin is testing the limits of presidential power with National Guard deployment with one adviser adding the president has plenary authority on use of army.
White House Deputy Chief of Staff Stephen Miller said President Donald Trump plenary authority under Title 10 of US Code when asked in Oct 6 interview if admin would follow a federal judge order not to deploy national guard to Portland Oregon, Time and outlets reported.
The interview was interrupted and phrase was not brought up when it resumed but Miller comment raised queries about how Trump admin interpretation of US law amid political fights with democrats over National Guard deployments.

plenary
What is the Insurrection Act?
During controversy over National Guard deployment Trump has threaten to invoke insurrection Act to bypass court ruling and local objections in Democratic led regions.
The insurrection act of 1807 in US federal law granting president in power to deploy army or national guard troops domestically to put down insurrection in emergency according to research paper by Jack Lasky in EBSCO and Brooking institutions.
what does plenary plenary authority mean?
Plenary means complete in respect absolute unqualified according to Merriam Webster.
Plenary authority means wide range broadly construed and limitless power according to Legal information institute at Cornell Law School though for publci officials more common term would be plenary power.
What did Stephen Miller say?
In Oct 6 interview with media anchor Boris Sanchez asked Miller whether the Trum admin would comply with federal judge order blocking admin from sending National Guard to Oregon
“Well the admin filed an appeal this morning with Ninth Circuit I would note Admin won an identical cas ein Ninth Circuit just few months befoer with respect to federalizing of California National Guard Miller replied.
Miller saying Under Title 10 of US code the President has plenary authority has before stopping suddenly.
Miller name and Miller blinked many time but die not replied.
Sanchex said Stephen I apologize it seem like we are having technical issues.