President-elect Donald Trump has a "Swiss Army knife" who top Trump advisers say is now "the most powerful unelected man in the White House," according to a report.

Far-right adviser Stephen Miller, who became known during Trump's first term for his brash demeanor and anti-immigration stance, has emerged as a key playmaker for Republicans seeking to pass any legislation in the upcoming term, Axios reported Friday afternoon.

Miller served as senior advisor for policy and White House director of speechwriting during Trump's first presidency. He was also instrumental in crafting some of the administration's most controversial immigration policies, including the Muslim travel ban and family separation policy at the U.S.-Mexico border.

Now Trump's deputy chief of staff, Axios reported he has asserted himself as a dominant figure as Trump's orbit prepares to pass his sweeping MAGA agenda through Congress.

"It seems very clear that if you want to get a piece of legislation done, you got to work with Stephen Miller," a top adviser to a Republican senator told the news outlet.

"Stephen is the Swiss Army knife for Trump: He does the policy, the politics and the media," a Trump insider told the news outlet.

Another adviser said Miller has brushed up on his interpersonal skills, too — honing his craft and avoiding some of the mistakes he made during the last Trump term, such as making enemies.

"Now he works the s---t out of everybody. ... Yeah, he has the ear of the president, but now he gets allies so that he can just have surround sound," said the adviser.

Another adviser, meanwhile, called Miller the "most powerful unelected man in the White House," according to Axios.

Hans Frank served as Hitler’s private attorney and chief legal strategist in the early years of the Nazi movement. While later awaiting execution at Nuremberg for his complicity in Nazi atrocities, Frank commented on his client’s uncanny capacity for sensing “the potential weakness inherent in every formal form of law” and then ruthlessly exploiting that weakness. Following his failed Beer Hall Putsch of November 1923, Hitler had renounced trying to overthrow the Weimar Republic by violent means but not his commitment to destroying the country’s democratic system, a determination he reiterated in a Legalitätseid—“legality oath”—before the Constitutional Court in September 1930. Invoking Article 1 of the Weimar constitution, which stated that the government was an expression of the will of the people, Hitler informed the court that once he had achieved power through legal means, he intended to mold the government as he saw fit. It was an astonishingly brazen statement.