COVID-19 had a surprising effect on 2020 US election

In the US 2020 presidential election, Donald Trump lost more ground to Joe Biden in counties that experienced fewer COVID-19 cases, a new study shows.

The findings run counter to prevalent media narratives that Trump lost the election because of the way he handled the COVID-19 pandemic. Several researchers determined that Trump would have won the electoral vote and lost the popular vote, as he did in 2016, if the pandemic had not occurred or if it had been mitigated.

Interestingly, not all the evidence supports the thesis that the handling of the crisis hurt Trump’s re-election, and quantitative evidence to support this narrative is limited.

In the new paper, published in the European Physical Journal, researchers put forward a spatial, information-theoretic approach to critically examine the link between voting behavior and COVID-19 incidence in the 2020 presidential elections.

While they concur with prior research that there were correlations between the two factors, they found that such an association points in the opposite direction from the accepted narrative.

“A tenable explanation of this observation is the different attitude of liberal and conservative voters toward the pandemic, which led to more COVID-19 spreading in counties with a larger share of Republican voters” says Maurizio Porfiri, professor at the New York University Tandon School of Engineering.

Key to the analysis is a way of quantifying uncertainty in statistical models. By using a novel spatial data modeling approach, and computing conditional mutual information between two processes (a target process like voting behavior and a second process, in this case, COVID-19 incidence), Porfiri and colleagues were able to infer spatial (geographic) connections.

This approach allowed them to determine the influence that epidemiological and economic processes might have had on voting behavior, as well as the spatial interactions that encapsulate the social and political fabric of the country.

From the analysis of county-level data, researchers uncovered a robust association between voting behavior and prevalence of COVID-19 cases.

The researchers determined that COVID-19 cases were negatively associated with the variation in the total vote count, whereby a larger increase in participation was observed in counties that were less affected by the pandemic, and a smaller increase in those that suffered the most from COVID-19.

When it comes to the difference in votes between the two parties, they found that Biden’s margin was higher in the counties that suffered the least from COVID-19. However, counties where Biden gained the largest margin were not identified by COVID-19 prevalence.

They also found that there were more likely to be large increases in the electoral participation and in Biden’s margin in counties that suffered more job losses; likewise, they found less participation and more support for Trump in counties that experienced smaller increases in unemployment rate.

“Our work demonstrates the value of spatial information-theoretic tools towards uncovering the mechanisms underlying government elections and, more generally, the socio-political fabric of a country,” says coauthor Pietro de Lellis of the University of Naples Federico II.

“This is critical to support decision-making processes in urban sciences, in a context where our cities face dramatic changes due to environmental and sociotechnical stressors, such as climate change and social justice.”

The National Science Foundation supported the work.

Source: NYU

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