AskHistorians

Not in exact words, that I am aware of. But he has proposed rounding up illegal immigrants and locking up political enemies, protesters, as well as going after "the enemy within". And has countless mentions of making an enemies list that has included everything from people who donated to Nikki Hailey to LGBT people or Democrats.

He wants to implement the Enemies Act of 1798 that was last used in WWII to place American citizens of Japanese descent in internment camps.

He has also recently proposed relocating the homeless, drug addicts and mentally ill to somewhere with cheap land.

He did say they can bring in doctors but given he is putting them there to remove them from society, the involuntary nature, and the massive funding cuts he wants in the federal government I would expect these to be terrible places.

Anyway we look at it he has been saying that he wants to detain millions of people in various ways for various reasons. What he does after that isn't entirely clear and can devolve with time. With unchecked power it's now almost completely in the hands of one person who was elected saying he wants this. Hitler didn't run for office saying he would kill the jews, lgbt, disabled etc either.