Who will win the US presidential election? By Michael Spence & David W. Brady




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Trump and Biden

If the latest polls are any indication, Joe Biden is on track win the popular vote in the upcoming US presidential election by a substantial margin, and an Electoral College reversal of that outcome, like in 2016, is unlikely. But the polls have been wrong before, including in 2016.

MILAN/STANFORD – In late July, opinion polls clearly indicated that US President Donald Trump had lost ground Joe Biden, Democratic challenger in the upcoming presidential election, owing primarily administration’s mismanagement of the . Since then, Trump’s fortunes have not improved; if anything, they have deteriorated . Now, Trump appears set not only to lose the popular vote on November 3, but also to fail to pull off an Electoral College upset, as he did in 2016.

Start party affiliations. As Table 1 shows, since the 2016 election, the Democratic Party’s ranks have grown by 6%, compared to just under 3% for Republicans. Self-identified independents declined by 8%. Among those who still identify as independents, the share of those leaning either left or right has changed little.

Moreover, as Table 2 shows, perceptions of Trump’s management of the -19 crisis have declined considerably since March, and even since July, especially among moderate Republicans, Democrats, and independents – three groups whose votes are decisive in battleground states. Trump’s overall approval rating has also declined, though not quite as much.

Regression analysis – using a wide array of known variables that are correlated voting behavior, including party affiliation and ideology – supports the assumption that the -19 crisis is a driver of this shift. This includes both the pandemic itself and the economic and employment crisis that it has caused.

To be sure, ongoing protests against systemic racism and brutality – which have often been met excessive force by – are also capturing American voters’ attention. But the way in which those protests are interpreted – that is, whether voters believe they are violent and require a strong “law-and-order” response – is overwhelmingly consistent along party lines, and thus unlikely to affect voting decisions significantly.

As Table 3, which uses data from October YouGov polls, shows, only 15% of Democrats believe the protests are violent. Of those, 19% – just 2.85% of all Democrats – vote for Trump because of the issue.

Overwhelmingly, Democrats still have no intention of voting for Trump, regardless of whether they identify as ultra-liberal, moderate, or anything in between. On the contrary, as Table 4 shows, even fewer to vote for Trump than the very few who were considering doing so in July, and even more to vote for Biden.

In 2016, support for Trump’s then-Democratic challenger, Hillary Clinton, was lower across all three categories of Democratic voter, especially among moderate and conservative Democrats (81%), than it is for Biden today. Since these data were collected in mid-October, when many people were already casting their ballots, there is little reason to think that the protests or anything else will increase Democratic support for Trump.

Biden is doing better than Clinton not only among Democrats, but among all voters. In 2016, Clinton won the popular vote by 2.1%, but lost in key battleground states, resulting in her defeat in the Electoral College. As Table 5 shows, the vast majority of those who voted for Clinton in 2016 intend to vote for Biden this year.

But Biden’s advantage is much larger. While most of Trump’s 2016 supporters also to vote for him again, he has lost more voters than the Democrats have. Add to that the fact that Clinton voters were already the larger group, and Biden’s lead among these two groups of voters reaches the 8% range. Third-party voters from 2016 are also more likely to prefer Biden Trump this year.

Biden’s advantage extends to the battleground states. Though the difference is somewhat smaller, the Democrats have retained more voters from 2016 than Trump has, and more third-party voters to vote for Biden than for Trump.

A demographic breakdown of the voting public, as shown in Table 7, reinforces the impression that Biden will come out ahead. Among every category of voter – young and old, female and male, non-white and white, more and less educated – Biden is doing better than Clinton was in 2016.

Of course, voting intentions matter little, if people cannot actually manage to vote. And this election is occurring amid a pandemic, which limits traditional voting methods. But, as Table 8 shows, far more voters – especially Democrats and independents, but also Republicans – are embracing early voting and voting by mail.

This could have implications for the election results – or, at least, how they are received. Issues arising from vote-by-mail systems, or even a protracted ballot-counting process, could fuel -level challenges to the results. Because Biden is likely to receive more mailed-in votes, he is more vulnerable to such challenges, which, if successful, could significantly alter the picture painted by the polling data. The States face a period of volatility as it awaits results.

Nonetheless, if the polls are a reasonably accurate indication, Biden is on track to win the popular vote by a substantial margin, and an Electoral College reversal of that outcome is unlikely. Trump’s hardcore base is simply not large enough to hand him victory, and he lacks the support of moderates and independents. Biden could suffer due to fragmentation within the Democratic Party – say, if progressive voters decide not to support him – but the polls show no evidence of this. The desire to vote Trump out seems to be too great.

Of course, the polls have been wrong before, including in 2016. The intentions of key groups of voters on either side not be accurately reflected in the results. In fact, when YouGov asked voters whether their neighbors would be surprised by their voting intentions, about 10% of urban and rural voters said “yes,” indicating that there be “hidden” voters for both candidates.

In short, Biden looks like he is headed to the White House. But the race isn’t until it is . (Project Syndicate)

Michael Spence, a Nobel laureate in economics, is Professor of Economics Emeritus and a former dean of the Graduate School of Business at Stanford University. He is Senior Fellow at the Hoover Institution, serves on the Academic Committee at Luohan Academy, and co-chairs the Advisory Board of the Asia Institute. He was chairman of the independent Commission on Growth and Development, an international body that from 2006-10 analysed opportunities for economic growth, and is the author of The Next Convergence: The Future of Economic Growth in a Multispeed World.  

•David W. Brady is Professor of Political Science and Leadership Values at Stanford University and Senior Fellow at the Hoover Institution.