Remember Paul Ryan? The speaker of the House used to be a media darling, lionized as the epitome of the Serious, Honest Conservative — never mind those of us who actually looked at the numbers in his budgets and concluded that he was a con man. These days, of course, he is overshadowed by the looming Trumpocalypse.

But while Donald Trump could win the White House — or lose so badly that even our rotten-borough system of congressional districts, which heavily favors the G.O.P., delivers the House to the Democrats — the odds are that come January, Hillary Clinton will be president, and Mr. Ryan still speaker. So I was interested to read what Mr. Ryan said in a recent interview with John Harwood. What has he learned from recent events?

And the answer is, nothing.

Like just about everyone in the Republican establishment, Mr. Ryan is in denial about the roots of Trumpism, about the extent to which the party deliberately cultivated anger and racial backlash, only to lose control of the monster it created. But what I found especially striking were his comments on tax policy. I know, boring — but indulge me here. There’s a larger moral.

You might think that Republican thought leaders would be engaged in some soul-searching about their party’s obsession with cutting taxes on the wealthy. Why do candidates who inveigh against the evils of budget deficits and federal debt feel obliged to propose huge high-end tax cuts — much bigger than those of George W. Bush — that would eliminate trillions in revenue?