People, some people including some pretty vile voices, are saying Trump quotes Buchanan in some of Sunday's tweets. Buchanan apparently quotes Trump:
Memo to Trump: Declare an Emergency | Patrick J. Buchanan
By Patrick J. Buchanan
In the long run, history will validate Donald Trump’s stand on a border wall to defend the sovereignty and security of the United States.
Why? Because mass migration from the global South, not climate change, is the real existential crisis of the West.
The American people know this, and even the elites sense it.
Read more at: https://buchanan.org/blog/memo-to-trump-declare-an-emergency-135677