Trump advisor Stephen Miller wanted to suspend the right of Habeas Corps — the right to force the government to justify, before a judge, why it has locked a person up — which is enshrined in Article I of the Constitution, reports MS NOW and The New York Times:
The suspension of habeas corpus has occurred just a handful of times in U.S. history, and always under the most dire circumstances of war or invasion. Yet to a greater degree than previously known, administration officials, encouraged by Mr. Trump, actively weighed taking that step in the early months of his second term — this time to accelerate the mass deportation of immigrants in the country illegally.
(Sources: The New York Times, MS NOW)