Khizr Khan, the father of the fallen U.S. Army Captain Humayun Khan, took to the stage of the Democratic National Convention in July and looked into the camera to address the Republican nominee Donald Trump directly. “Have you even read the United States Constitution?” Khan asked while holding up a little blue book as the crowd cheered. “I will gladly lend you my copy.”

Five months later, it’s clear that Trump, now our president-elect, never took Khan up on that offer. Instead, he consistently rallied his base behind policies that, according to legal experts, flout core tenets of constitutional law. These proposals included the wholesale deportation of millions of undocumented immigrants, a ban on Muslims entering the country, the surveillance of American-Muslims, the return of torture in criminal interrogation, restrictions on the press, and the outlawing of flag-burning.

Of course, what is and isn’t constitutional is a constant source of debate. Every controversial Supreme Court decision is assailed by its critics as an affront to the Constitution, even as its supporters hail a victory for constitutional rights. There were plenty of such examples this year, including the Supreme Court upholding the affirmative action program at the University of Texas and Apple winning a major data privacy battle against the FBI when it refused to assist in unlocking the iPhone of the San Bernardino shooter.

But Trump, the one-man wrecking ball, has distinguished himself by popularizing norms that are fundamentally at odds with principles that have guided the republic for 229 years. Here’s how he did it:

Deporting undocumented immigrants en masse

In a 60 Minutes interview last November, Trump said that he hoped to model his deportation of 11 million undocumented immigrants after Dwight Eisenhower’s Operation Wetback. He suggested “rounding them up in a very human way, a very nice way,” then transporting them en masse across the border.