If personnel is policy, then President Donald Trump has made his post-midterm agenda abundantly clear. On Friday, Trump announced on Truth Social that Deputy Chief of Staff Stephen Miller would become his full chief of staff beginning Monday. The promotion of Miller, an immigration guru and loyal lieutenant of Trump since his 2016 campaign, amounts to a political declaration of war on the incoming Democratic congressional majority.

In isolation, the staffing decision was nondescript. Following the devastating electoral loss, President Trump “wanted to make a change” in the White House, he told reporters. Chief of Staff Susie Wiles had already reached the average tenure in the role, which she held for nearly two years. On Thursday, Wiles resigned. Trump then promoted the man in the deputy position and said that Wiles would take a position in the Trump political organization.

The significance comes from Miller’s long tenure in Trump’s orbit as “one of my most trusted advisors,” in Trump’s words. Miller is characterized by both his staunch loyalty to the president and his eagerness for political combat.

Upon receiving the chief of staff role, Miller reaffirmed his loyalty. “We need to stand with the man who has stood with us and this country with every fiber of his being. … And I swear to you, and I pledge to you, Mr. President, my absolute loyalty, my unwavering commitment, and my total devotion to your success and the success of this country.”

“The mission now is more clear than ever,” Miller insisted Friday on X. “Fight with all of our soul to support our President and defend this magnificent Republic.” Such words signal a strident tone for the second half of Trump’s term.

Thus far, Democrats have responded in kind. “Stephen Miller is the architect of the most barbaric, inhumane policies of this administration. Trump couldn’t have made a worse choice,” snarled Senator Chuck Schumer (D-N.Y.), who is set to go from Senate minority leader to Senate majority leader if he can hold onto his leadership role. “Our Democratic majorities will fight him every step of the way.”

House Minority Leader Hakeem Jeffries (D-N.Y.) echoed the sentiment. “There’s not going to be any opportunity, certainly, to work with Stephen Miller and what he represents. … We’re committed to forcefully pushing back against the extremism that they may try to continue to unleash on the American people.”

Other progressives in Congress joined the chorus of animosity towards Miller. “Trump’s naming of Stephen Miller to be Chief of Staff is a giant middle finger to every single voter who came out to the polls and demanded a change from the corruption and cruelty of the last two years,” complained progressive Rep. Pramila Jayapal (D-Wash.).

“Stephen Miller is the architect of Trump’s rogue immigration policy. Appointing him Chief of Staff is an act of vengeance against the millions of Latinos who came out to call for abolishing ICE,” raged Rep. Ro Khanna (D-Calif.). “No matter what position Miller holds, House Democrats will hold him accountable.” Rep. Robert Garcia (D- Calif.) also warned Miller to “lawyer up,” threatening that “Oversight Democrats will continue to investigate Miller for his misconduct, and we will fight against his hateful policies in Congress and the courts.”

(Democrats are right to identify Miller as the mastermind of Trump’s immigration policy in both terms. Interestingly, however, within days of promoting Miller, Trump admitted on Sunday that he thought his immigration enforcement policies had been “too tough.”)

Other Democrats stooped to vile name-calling. Rep. Monica McIver (D-N.J.) called him a “white supremacist.” Senator Ruben Gallego (D-Ariz.) described him as “the brains behind the most depraved immigration policies we’ve seen in generations.” Outgoing California Governor Gavin Newsom (D) bashed him as “one of the most vile thugs to ever slither into the Oval Office.”

Given his steadfast endurance amid years of criticism, Miller’s skin is probably thicker than that of most people. But such personal insults must inevitably leave an impression. Come next year, Miller will likely show no more interest in working with congressional Democrats than they have shown in working with him.

Miller displayed his combative attitude during a fiery speech last year during the memorial service for Charlie Kirk. In contrast to Erika Kirk, who publicly forgave her husband’s killer, Miller promised to respond with “a righteous fury that our enemies cannot comprehend or understand.”

“We are the storm. And our enemies cannot comprehend our strength, our determination, our resolve, our passion. … They cannot imagine what they have awakened. They cannot conceive of the army that they have arisen in all of us because we stand for what is good, what is virtuous, what is noble,” Miller declared. “To those trying to incite violence against us, those trying to foment hatred against us, what do you have? You have nothing. You are nothing. You are wickedness. You are jealousy. You are envy. You are hatred. You are nothing.”

“We will defeat the forces of darkness and evil,” he concluded. “We will achieve victory for our children, for our families, for our civilization, and for every patriot who stands with us.”

In sum, Miller believes his fight against progressive Democrats is a crusade of good versus evil. He has declared war, and so have they. And now, by appointing Miller to the most influential position in his administration, President Trump has signaled that the battle lines are being drawn.