WASHINGTON — Who is John Lewis that Donald Trump should be mindful of him?

Lewis, by one definition, is a 76-year-old, liberal politician with a disturbing habit of hyperbole. He questioned the validity of George W. Bush's presidential win. He once compared John McCain to George Wallace. Now he questions the legitimacy of Trump's presidential victory.

By another definition, Lewis was a consequential student leader of the civil rights movement. He led sit-ins to desegregate lunch counters; was one of the original Freedom Riders who integrated buses; experienced the hospitality of places like Mississippi's Parchman penitentiary; and carried away the memento of a skull fracture from Selma.

It must be said that the whole business of questioning a president's right to hold office is pernicious. It puts a hard stop on all civility and cooperation. The worst instance, of course, was the claim that Barack Obama was Kenyan-born and disqualified to be president — an argument based on partisan, conspiratorial and quasi-racist lies enthusiastically spread by Trump. When the president-elect calls out Lewis on this topic, it is a display of hypocrisy so large that it is visible from space.

A conservative friend tells me I'm too concerned about Trump's "manners." Probably. (Though it strikes me as odd for any conservative to dismiss the gestures of mutual respect that make democracy and human society possible.)

The problem, however, runs deeper. Trump seems to have no feel for, no interest in, the American story he is about to enter. He will lead a nation that accommodated a cruel exception to its founding creed; that bled and nearly died to recover its ideals; and that was only fully redeemed by the courage and moral clarity of the very people it had oppressed. People like Martin Luther King Jr. People like John Lewis.

There are a lot of debunkers at work in American society. They point out that the priest is really a balding, middle-aged man with sweat stains at his armpits. They see the judge as an old woman who has the remnants of lunch caught between her teeth. They see John Lewis as just another career politician. But the priest holds the body of Christ, the judge embodies the rule of law and Lewis once carried the full weight of America's promise across the Edmund Pettus Bridge.

Were John Lewis to call me every name in the book, I would still honor him.

Trump often justifies his attacks as counterpunching. Even a glancing blow seems to merit a nuclear response. But this is the exact opposite of the ethical teaching of the Sermon on the Mount, and of the principled nonviolence of the civil rights movement. In these systems of thought, the true victory comes in absorbing a blow with dignity, even with love. It is the substance of King's message. It is the essence of a cruciform faith.

This is not always easy to translate into politics. But a president-elect attacking a hero of the civil rights movement less than a week before he takes the oath of office is not normal. There is some strange inversion of values at work. Because Vladimir Putin praises him, Trump defends him. Because Lewis criticizes him, Trump attacks him (as "All talk, talk, talk — no action or results"). The only organizing principle is the degree of deference to Trump himself. It is the essence of narcissism.

A broader conception of the American story — a respect for the heroes and ghosts of our history — is absent in Trump's public voice. He seems to be in the thrall of an eternal now. To some, the whole idea of a historical imagination will sound nebulous. Abraham Lincoln called it the "mystic chords of memory." He hung his hopes for unity on the existence of a shared national experience that transcended regional differences. Today our divisions are more along lines of class and culture, but we also need to hear our story as one people.

Not every citizen shares this sense of history. It is a minority of Americans who visit Antietam and feel oppressed by the immense weight of collective death; or go to the Lorraine Motel in Memphis and feel sickened by the scale of such a loss; or walk across that bridge in Selma and hear the echoes of snarling dogs and nightsticks against bone.

But we need a president who respects and evokes this story — or at least does not peevishly attack its heroes.