Why such a frenzy of untruth? Because Trump apparently sees anger building among his most fervent supporters over his utter failure to deliver on what they understood as his central campaign promise: to halt or reverse the flow of Latino immigration and the “browning” of America.

That’s what this is really about. On the emotional level, Trump appealed to white Anglo chauvinism. He skillfully stoked the anger and resentment of those who are annoyed when they phone the electric company to straighten out a bill and are told to press 1 for English, press 2 for Spanish. When he writes things like “our country is being stolen,” it’s crystal-clear who’s supposed to be stealing it.

What I didn’t realize during the campaign was that Trump’s base realized he could never fulfill his absurd pledge to deport all of the estimated 11 million people who are here without papers. But his supporters did expect him to do something to stem what they see as an invasion — something concrete and unambiguous. Like the promised wall.