But on earth, how best to protect what it means to be American is an impregnable barrier.

A good option, I think it says you can tear down the Statue of Liberty.

I think, it says was a clothes shop, a nation of settlers that for some is turning on outsiders.

As America votes, immigration is high on the ballot.

We talked to those who see Donald Trump's border wall as a betrayal of American ideals.

I just see this on a daily basis and sometimes just hits you and those for whom there's no price too high to pay to protect away.

They hold dear.

You're prepared to use that.

So, yeah, if it comes down to it, I'm coming home.

The biggest beneficiary, it maybe happens to be Arizona.

That wall.

How good is the wall?

It is the iconic idea of Trump's America this'll this cowboys and big skies part of the iconography of America.

Alright, alright, guys.

Okay, Bill McDonald's ranch in Arizona is just a few miles from the border with Mexico, illegal immigration and drug trafficking, a live issues here.

Yet for him, a Republican billions spent on a border war is a waste of money.

People think well, you build a wall, you've solved the problem.

They've already got saws that cut through that wall.

You could do it with technology and do it just a well.

It's politically made a promise.

He was determined to keep it, He thought, if he kept it to get reelected, it's the only reason he does anything.

I'm not crazy about everybody who crosses the border, but I'm not crazy about everybody had already lives here, either.

I mean, there are good people and they're bad people in all stripes.

You can't characterize people by where they come from.

It takes a few hours to sort the carves for sale headed for Oklahoma.

They'll never see their mothers again with, as business activists say, over 500 Children remain separated from their families.

Building a big wall was only part of the plan.

Critics in Congress and human rights groups claimed migrants were being treated like cattle under Donald Trump, zero tolerance child separation policy to deter illegal migration.

Eventually, his administration was forced to change course, but secure borders are a necessity.

We saw a drug cartel spotters across the wall in Mexico, checking if the coast is clear to send over human mules.

These ones went that way.

So yesterday I, Tim Foley, often spots them to videoing the mules camouflage with their backpacks of drugs.

From his remote base in southern Arizona, he leads a group of armed volunteers that patrols the border.

Is a wall making America great again?

It's making it safer.

This is my dim represents a strain of American patriotism.

Donald Trump tapped into giving up everything he knew in San Francisco to come to Arizona.

Why were you involved?

What?

What is it about the situation that gets you angry?

I didn't trust the government or the media to tell the actual truth of what was going on.

Um, some apple sauce.

But what is the truth?

There's another group of volunteers on the border.

They're from a charity that leaves water and food supplies for people crossing over from Mexico.

Asylum seekers fleeing persecution on migrant families, with Children reaching for a better life.

It must be difficult.

They also help families find relatives who've gone missing crossing the border.

So what are the kinds of things that you come across on the trails many times we find remains skeletal remains of, um, border crossers.

You also see clothes and abandoned shoes, you know, evidence of, ah, like, ah, person's life.

So you see wedding ring.

Um, you see love letters, a lot of rosaries, a lot of Bibles.

You also see cosmetic products thrown in the desert deodorant lipsticks, and you wonder why Why bring those artifacts along?

And it's many times migrants want to meet their loved ones with, you know, smelling good and looking presentable after a long journey in this one area, the remains of 181 people have been found this year.

You see young, young people, old people.

You see everybody and you see the families, the families just reach out to us.

Um, desperately looking for their loved one.

It's an unimaginable pain and anguish.

They had the water drops sitting over here.

Often gear and Tim's worlds collide on.

There's one thing they both agree on.

What's the tattoo?

One of the horsemen of the Apocalypse?

Uh, that's what I see is coming it Z.

It's my view of the border.

There's death all around.

Donald Trump's wall speaks to us all.

We project on the barrier, our own values.

This election sees millions of Americans casting their votes in line with who they believe they really are.

Clive Myrie, BBC News in southern Arizona.