WASHINGTON (NYTIMES) - If President Donald Trump pieces together an Electoral College win on Tuesday (Nov 3), at least one pollster - and perhaps only one - will be able to say, "I told you so".

That person is Mr Robert Cahaly, whose Trafalgar Group this year has released a consistent stream of battleground-state polls showing the President highly competitive against Mr Joe Biden, and often out ahead, in states where most other pollsters have shown a steady Biden lead.

Trafalgar does not disclose its methods, and is considered far too shadowy by other pollsters to be taken seriously.

Mostly, they dismiss it as an outlier. But for Mr Cahaly, "I told you so" is already a calling card.

In 2016, its first time publicly releasing polls, Trafalgar was the firm whose state surveys most effectively presaged Mr Trump's upset win.

A veteran Republican strategist, Mr Cahaly even called the exact number of Electoral College votes that Mr Trump and Mrs Hillary Clinton would receive - 306-227 - although his prediction of which states would get them there was just slightly off.

So with liberal anxieties flaring over whether to trust the polls, the gregarious, goatee-and-bowtie-wearing Mr Cahaly has been in demand on cable news lately.

In addition to frequent appearances on Fox News, Mr Cahaly was on CNN last week, explaining to Mr Michael Smerconish why he thought the President would walk away with an easy victory - and defending himself against a battery of critiques that Mr Smerconish called up, one by one, from Mr Cahaly's peers.

Amid a crush of pre-election media coverage seeking his theory of the case - it drove more than 1.5 million clicks to Trafalgar's site on Monday (Nov 2), he said - the big question seems to be: Is it possible to believe a guy whose polls consistently give Mr Trump just enough support for a narrow lead in most swing states, and who refuses to reveal much of anything about how he gets his data?

In his last few polls of this election season, Mr Cahaly has found Mr Trump with 2-to-3-point advantages in North Carolina, Arizona, Michigan and Florida, and wider leads elsewhere.

That puts him far out of line with almost all major pollsters, whose surveys in those states are generally showing Mr Biden with the edge.

As different as things are this year, it's hard to miss the echo of 2016, when Trafalgar occupied a similarly lonely position on the eve of Nov 8.

Above all, Mr Cahaly's approach centres on the belief that everyone lies, but especially conservatives.

This has largely been disproved by social science, but that hasn't softened his conviction.

To hear him explain it, traditional pollsters (he calls them "dinosaurs") are crippled by "social desirability bias": the tendency for respondents to say what they think an interviewer wants to hear, not what they actually believe.

In Mr Trump's America, he says, that problem has grown worse.

"I just think people are not what they say they are, ever," Mr Cahaly said in a recent phone interview from Atlanta, where he lives.

"We cannot eliminate the social desirability bias, we can only minimise it."

Four years ago, he addressed this by asking people both whom they would support for president and whom they thought their neighbours would support.

This year, he said, he is using other means to achieve the same result.

But he's not saying what they are. Mr Cahaly releases almost no real explanation of his polling methodology; the methods page on Trafalgar's website contains what reads like a vague advertisement of its services and explains that its polls actively confront social desirability bias, without giving specifics as to how.

He says that he uses a mixture of text messages, e-mails and phone calls - some automated, and some by live callers - to reach an accurate representation of the electorate.

Conventional pollsters, who abide by long-tested and broadly effective methods to glean a representative sample, aren't buying it.

Besides, if there was ever such a thing as a "shy Trump supporter" - someone reluctant to admit that he or she plans to vote for the President - that species has been made virtually extinct during the raucous, rally-holding Trump presidency, said Mr Daniel Cox, a polling and public opinion expert at the conservative-leaning American Enterprise Institute.

"People do not seem embarrassed to support Mr Trump," Mr Cox said.

In the past four years, studies seeking to quantify a so-called "shy Trump" effect in surveys have generally found little evidence to support it.

Late last month, Mr Nate Silver of FiveThirtyEight got his hands on the cross tabs of a Trafalgar poll of Michigan that was still in progress.

It found that more than a quarter of Democrats and Republicans expected to vote for the other party's nominee, so far out of line with almost all other polls that Mr Silver called the numbers "just crazy".

Mr Cahaly, of course, has no use for the scepticism of experts. He doesn't seem to care whether he's abiding by the best practices of the American Association of Public Opinion Research, the standard-bearing trade organisation, any more than Mr Trump says he cares whether the United States' Nato allies respect him.

Among his polling colleagues, the main sticking point is Mr Cahaly's lack of transparency about his methods.

Dr Josh Pasek, a professor of communications, data and political science at the University of Michigan, said that without a sense of the methods the firm uses to reach survey respondents, it's not possible to rely on the numbers.

"It is wildly inappropriate not to tell me, not only what modes you use to draw your sample, but how specifically you did it," he said.

His general rule: "If somebody's not transparent, you can generally assume they're crap."

There is something undeniably enticing about the story of a swashbuckling, norm-busting Southern pollster who rode into 2016 with a fresh approach and proved all the bigger shops wrong.

Born in Georgia and raised in upstate South Carolina by a banker and a teacher, Mr Cahaly developed a politics obsession as a child and majored in it at the University of South Carolina.

He soon came under the wing of pollster Rod Shealy, an acolyte of Republican strategist Lee Atwater, and eventually started his own firm.

Named after a battle in the Napoleonic Wars when the British navy turned back French and Spanish ships on the high seas, Trafalgar, which he runs alone, has been doing surveys on behalf of clients since 2006.

Most of Trafalgar's polling is done for conservative and Republican clients, although - in another snub of traditional standards - it has not reliably revealed when surveys are paid for by partisan interests.

In 2010, Mr Cahaly was arrested and taken to court for violating a law against using automatic calling machines - known as robocalling - to conduct polls.

The charges against him were eventually dropped, and he later successfully sued a state law enforcement agency, causing South Carolina's prohibition on robocalls to be declared unconstitutional.

Mr Cahaly said he was doing legitimate polling, aimed at truly understanding voters' opinions - and getting what he called "dead-on" results.

During the 2016 Republican primaries, he was early to spot a surge of enthusiasm from many working-class voters who had long felt alienated from politics and helped power Mr Trump's ascent.

"I kept getting these stories about people who showed up to vote and didn't know how to use the voting machines, they hadn't voted in so long," Mr Cahaly said.

So he began to look into who those people might be, and used data available online to create a list of roughly 50 lifestyle characteristics - including, for instance, whether they owned a fishing licence - to identify the sorts of low-engagement voters who were turning out in droves.

He used that data to make sure he was reaching the right kinds of respondents as he polled off the voter file in advance of the general election.

In 2018, Mr Cahaly again amassed a successful track record polling Senate and governors' races, including surveys that correctly presaged Mr Ron DeSantis' and Mr Rick Scott's wins in Florida.

This year, he has continued to see strong Trump support among these voters, and he believes other pollsters are again underestimating their importance.

Among Mr Cahaly's theories is that it takes five times as many calls to get a conservative voter to complete a poll than to get a liberal one.

Others in the field say they find no evidence to support this in their own work.

But Mr Cahaly insists it is presumptuous for pollsters to assume that they are drawing a representative sample of voters just because they are adhering to the scientific method.

He returns to the country's political divide, and how unwilling Americans are nowadays to communicate with each other from across the breach of suspicion.

In a sense, he has positioned himself as a bard of Trumpism, giving voice to a silent majority - or at least, a majority in the Electoral College - that knows the elites consider its views deplorable, and therefore won't express them freely to just anyone.

"Lee Atwater drilled into everyone around me that you have to get out of the head of politicos and into the head of Joe Six-Pack," Mr Cahaly said.

"What do the average people think? And to do that I like to talk to average people. I like to follow up polling calls and chat with people for 30 minutes."

Mr Cahaly feels no need to reveal his techniques, despite the near-universal doubt about his work from his peers.

"I've given away enough; I'm not giving away any more," he said, arguing that it had been a mistake to even tell the public about his "neighbour question", which some other firms have since adopted in their own surveys.

"I think we've developed something that's very different from what other people do, and I really am not interested in telling people how we do it," he said.

"Just judge us by whether we get it right."