The election results in Iran may reflect the will of the Iranian people. Many experts are claiming that the margin of victory of incumbent President Mahmoud Ahmadinejad was the result of fraud or manipulation, but our nationwide public opinion survey of Iranians three weeks before the vote showed Ahmadinejad leading by a more than 2 to 1 margin – greater than his actual apparent margin of victory in Friday's election.

While western news reports from Tehran in the days leading up to the voting portrayed an Iranian public enthusiastic about Ahmadinejad's principal opponent, Mir Hossein Mousavi, our scientific sampling from across all 30 of Iran's provinces showed Ahmadinejad well ahead.

Independent and uncensored nationwide surveys of Iran are rare. Typically, pre-election polls there are either conducted or monitored by the government and are notoriously untrustworthy. By contrast, the poll undertaken by our nonprofit organisations from 11 May to 20 May was the third in a series over the past two years. Conducted by telephone from a neighbouring country, field work was carried out in Farsi by a polling company whose work in the region for ABC News and the BBC has received an Emmy award. Our polling was funded by the Rockefeller Brothers Fund.

The breadth of Ahmadinejad's support was apparent in our pre-election survey. During the campaign, for instance, Mousavi emphasised his identity as an Azeri, the second-largest ethnic group in Iran after Persians, to woo Azeri voters. Our survey indicated, though, that Azeris favoured Ahmadinejad by 2 to 1 over Mousavi.

Much commentary has portrayed Iranian youth and the internet as harbingers of change in this election. But our poll found that only a third of Iranians even have access to the internet, while 18-to-24-year-olds comprised the strongest voting bloc for Ahmadinejad of all age groups.

The only demographic groups in which our survey found Mousavi leading or competitive with Ahmadinejad were university students and graduates, and the highest-income Iranians. When our poll was taken, almost a third of Iranians were also still undecided. Yet the baseline distributions we found then mirror the results reported by the Iranian authorities, indicating the possibility that the vote is not the product of widespread fraud.

Some might argue that the professed support for Ahmadinejad we found simply reflected fearful respondents' reluctance to provide honest answers to pollsters. Yet the integrity of our results is confirmed by the politically risky responses Iranians were willing to give to a host of questions. For instance, nearly four in five Iranians – including most Ahmadinejad supporters – said they wanted to change the political system to give them the right to elect Iran's supreme leader, who is not currently subject to popular vote. Similarly, Iranians chose free elections and a free press as their most important priorities for their government, virtually tied with improving the national economy. These were hardly "politically correct" responses to voice publicly in a largely authoritarian society.

Indeed, and consistently among all three of our surveys over the past two years, more than 70% of Iranians also expressed support for providing full access to weapons inspectors and a guarantee that Iran will not develop or possess nuclear weapons, in return for outside aid and investment. And 77% of Iranians favoured normal relations and trade with the United States, another result consistent with our previous findings.

Iranians view their support for a more democratic system, with normal relations with the United States, as consonant with their support for Ahmadinejad. They do not want him to continue his hard-line policies. Rather, Iranians apparently see Ahmadinejad as their toughest negotiator, the person best positioned to bring home a favourable deal – rather like a Persian Nixon going to China.

Allegations of fraud and electoral manipulation will serve to further isolate Iran and are likely to increase its belligerence and intransigence against the outside world. Before other countries, including the United States, jump to the conclusion that the Iranian presidential elections were fraudulent, with the grave consequences such charges could bring, they should consider all independent information. The fact may simply be that the re-election of President Ahmadinejad is what the Iranian people wanted.

This article originally appeared in the Washington Post.