TOMORROW will be a heck of a day. In the big story, Scots will find out if we have voted to remain in the European Union only to be forced out against our will. In the minor story – Donald Trump will open his revamped golf course at Turnberry, or the Trump Turnberry Resort as most Scots must now remember not to call it.

Is there a connection between the two? Hell yeah.

The Donald backs Brexit “for a lot of reasons, like less bureaucracy". But the connection goes much deeper than that. Both campaigns have been built around fear, disgust and hate. Trump has spent most of his presidential campaign warning about the dangers posed by Mexican immigrants, Muslims from any country and Syrian refugees. Just as Reagan once wanted a shield over America to intercept all foreign missiles, Trump wants a wall along the southern border of the United States to keep Mexicans out.

It’s simplistic, xenophobic, narrow-minded and frightening. And he might just win.

Immigration has also been centre stage in the European debate, culminating in Nigel Farage’s “Breaking Point” poster with queues of non-white faces apparently swarming at the British border.

A shameful poster, whose launch – on the same day Jo Cox was killed – has hopefully been its downfall. Wendy Rahn, a political science professor at the University of Minnesota who has studied Trump voters, has said: “I see similar themes on both sides of the Atlantic – a strong sense of threatened national identity, anti-globalisation, nostalgia, and [an assertion] that elites aren’t accountable.”

According to Charles Grant, director of the Centre for European Reform, Brexit supporters mirror Trump voters who tend to be older, white, less affluent, and less likely to live in urban areas – folk left behind by Britain’s shockingly poor pensions provision but who blame our fast-changing world instead.

And that threatening, ever-changing world is most easily personified by the new languages, faces and dress codes on our streets.

Besides a paranoia about immigration, Donald Trump and Nigel Farage have quite a lot in common personally – both are businessmen who have become politicians, both have been shunned by the “respectable” leadership of their own sides (Farage was noticeably absent from the Vote Leave team on Tuesday night’s BBC Great Debate) and both have thrived in the fetid atmosphere of slightly wounded exclusion.

As Annie Lowrey of New York magazine puts it: “Trump is a rich and connected New Yorker, a Wharton grad, and the coddled inheritor of a real-estate fortune. Nevertheless, with his middle finger raised to the Republican Establishment and common standards of propriety, he has ridden a wave of distaste for the more buttoned-up masters of the universe. Similarly, the Leave campaign has painted the Remain campaign as urbane, out of touch, and beholden to a bunch of inept pencil pushers in Brussels, and has argued against trusting experts, elites or the powerful.”

But sticking my neck out, I’d say Donald and Nigel have yet one more thing in common – despite running rings around a fearful and fawning media, they both look set to lose because of the sheer nastiness of their campaigns.

London Mayor Sadiq Khan put it very well in the BBC debate when he told Boris Johnson: “Your campaign isn’t Project Fear, it’s Project Hate.” He could as easily be speaking to The Donald. Strong feelings on issues are fine, but when politicians cross the line, reasonable voters sense it. Farage with his hateful poster and Trump with his hate-filled vision of a Muslim- and Mexican-free society are so far over the line they’ve lost track of the things most people care about.

Trump's fluidity with the truth defines his relationship with Scotland

With Trump in charge Turnberry may never stage the Open

How much did the Turnberry revamp really cost Trump?

New campaign finance reports show that Trump had less than $1.3 million in the bank heading into June – a lot in UK terms but a tiny sum for an American presidential campaign. Trump blames Republican party grandees, telling ABC News: “I’m having more difficulty, frankly, with some of the people in the party. If it gets to a point, what I’ll do is just do what I did in the primaries.”

He lent his presidential campaign more than $43m. But the rest of this campaign will eat up hundreds of millions. Where will that come from? When pressed, Trump replied characteristically: “I’ll sell a couple of buildings.”

In short, Trump’s campaign is already coming off the rails.

And not just his own presidential campaign. If he abandons the Republican Party’s formal campaign and its fundraising campaign that starts in the autumn, he endangers the electoral chances of hundreds of other Republicans standing in other elections.

According to Republican strategist and fundraiser Austin Barbour: “If they don’t fix this in a massive way, it’s going to have widespread implications down the ballot.

“If Trump’s not raising hundreds of millions of dollars, there are gubernatorial races, senate races, congressional races, attorney general races, you name it, that will be impacted.”

But why should that matter to The Donald? He only cares about Number One. And it shows.

The Republican billionaire dumped controversial campaign manager Corey Lewandowski this week as his poll ratings began to drop after his tasteless self-congratulatory tweet in the wake of the Orlando massacre.

And here in Scotland, although he’s here to open another resort, his golf business is a shadow of the international operation he promised six years ago.

Trump has already wrecked the reputation of Turnberry, which was meant to host the 2020 Open Championship. Not anymore. Tomorrow’s opening has been boycotted by the national leaders of every political party invited – presumably some local dignitaries will be there, smiling through gritted teeth and thinking about the jobs dependent on the whim of their temperamental new owner. But it’s hardly national endorsement. There will be a presence of Scots greeting The Donald – several bus loads will travel from Glasgow to a rally opposite the resort entrance organised by Stand Up to Racism.

Meanwhile in Aberdeenshire, two of the folk Trump tried unsuccessfully to drive from “his” land on the Menie estate have raised Mexican flags on their homes. According to David Milne: “I am currently flying a Mexican flag along with my usual Saltire just for solidarity along with those worldwide who Trump has decried, insulted and threatened over the years, and will continue to decry, insult and threaten.”

He said there were no plans to hold a protest during Trump’s visit.

“We don’t think he’s worth the effort but the flag will be visible from the clubhouse. It’s just enough to remind him that where he tried to drive us out he failed completely on that front.” You’ve got to love that. Funny, cheeky and defiant. Thrawn Scottishness at its best.

The other Mexican-flag-waver is Michael Forbes, voted Scot of the Year by the general public in the Glenfiddich Spirit of Scotland awards 2012, after which Trump said he would be boycotting Glenfiddich and many Scots tweeted pictures of themselves buying crates of the stuff. Trump has tried everything to get Forbes out – branding him “a pig” and his home “a slum,” cutting off water supplies and building a huge earth wall around his property. Michael Forbes is still there.

But Trump’s big golf earnings aren’t. According to filmmaker Anthony Baxter (whose films about Trump have won several international awards): “the latest figures show that, along with his Turnberry golf course, the two lost £2m over the last financial year. In Aberdeenshire, far from creating the 6,000 jobs promised by The Trump Organisation, the golf course employs just 95 people – and most of those are low-paid positions. There is no hotel, not one of the houses has been built, and the unique Site of Special Scientific Interest where the single golf course was constructed has been destroyed – depriving future generations of a spectacular centuries-old dunes landscape.”

Trump has also been beaten by the offshore wind turbine test centre he so hated – in December of last year it got the go-ahead off the Aberdeenshire coast when the UK Supreme Court unanimously ruled against his planning objections.

So how should Scots deal with The Donald tomorrow?

The best greeting would be a Remain vote, demonstrating that racist paranoia has no home here.

If that happens, Trump will be on the back foot throughout his visit and hopefully his discomfiture will be relayed to American voters watching back home.

If Leave wins, Trump’s triumphalist presence will be well-nigh unbearable.

The Donald will try to inflame the situation, because that’s what he does. Correction – that’s all he does.

So every Remain voter with a prominent house between Prestwick and Turnberry needs a Mexican flag tomorrow. Folk living around the Menie Estate need Mexican flags.

So do the protestors heading thereby bus. Solidarity is what Scots do well.

Eventually, Donald Trump will realise that.