The fact that a big portion of Trump's supporters are a shrinking electorate may explain his policies.
When Donald Trump swanned down the escalator at Trump Tower in June 2015 and announced he was running for president, he said he felt called to duty in order to stem the tide of immigrant criminals. At the time, most Americans scratched their heads because there was no U.S. police data to back him up. But demographic data do indicate that America is becoming a brown nation.
Everything President Trump has done regarding immigration, up to and including rescinding DACA, looks brutal and illogical. Rescinding DACA is likely to be a short-term loser for his diving popularity, but for conservatives, rescinding DACA is the Hail Mary pass at the end of a decades-long game to maintain the whiteness of the American electorate.
When President Barack Obama enacted DACA, conservative pundits fumed that it was aimed at creating a pool of brown voters. There was some truth to that: Although the 800,000 people currently covered by DACA cannot vote, their continued presence in the United States means that there will eventually be more non-white babies in the country.
But America doesn’t need DACA to get more brown children than white children.