U.S. Presidential Voting History from 1976-2020 (Animated Map)
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U.S. Presidential Voting History by State
After a tumultuous election, all states have now certified their 2020 presidential voting results. Which states changed party allegiance, and how do the results compare to previous years?
In this graphic, we use data from the U.S. National Archives and the MIT Election Data and Science Lab to show U.S. presidential voting history by state since 1976.
Note: this post has been updated on January 19, 2021 to reflect the latest data.
Each State’s Winning Party
To calculate the winning ratio, we divided the votes for the state’s winning party by the total number of state votes. Here’s another look at the same data, visualized in a different way.
This graphic was inspired by this Reddit post.
As the voting history shows, some states—such as Alaska, Oklahoma, and Wyoming—have consistently supported the Republican Party. On the other hand, Hawaii, Minnesota, and the District of Columbia have been Democrat strongholds for many decades.
The District of Columbia (D.C.) is a federal district, and is not part of any U.S. State. Its population is urban and has a large percentage of Black and college-educated citizens, all of which are groups that tend to identify as Democrat.
Swing states typically see a close contest between Democrats and Republicans. For example, Florida’s average margin of victory for presidential candidates has been just 2.7% since 1996. It’s often seen as a key battleground, and for good reason: the state has 29 electoral college votes, meaning it has a high weighting in the final outcome.
Memorable Election Years
Within U.S. presidential voting history, some election results stand out more than others. In 1984, President Reagan was re-elected in a landslide victory, winning 49 out of 50 states. The remarkable win has been credited to the economic recovery during Reagan’s first term, Reagan’s charisma, and voters’ opposition to the Democrat’s planned tax increases.
In 1992, self-made Texas billionaire Ross Perot ran as a third-party candidate. He captured almost 19% of the popular vote, the highest percentage of any third-party presidential candidate in over 80 years. While he gained support from those looking for a change from traditional party politics, Bill Clinton ultimately went on to win the election.
Most recently, the 2020 election had a record voter turnout, with 66.3% of the eligible population casting a ballot. There was also a record number of mail-in ballots due to the COVID-19 pandemic. This led to widespread allegations of voter fraud, with President Trump and his allies filing 62 lawsuits seeking to overturn election results. In the end, 61 of the lawsuits were defeated and congress confirmed Joe Biden’s victory.
Voting History of Swing States
Both Trump and Biden focused on battleground states in 2020, but where were they successful? Here are nine of the swing states, and their voting history over the last two elections.
|2020 Winning Ratio||2020 Margin of Victory||2016 Winning Ratio||2016 Margin of Victory|
|Arizona||49.4% Democrat||0.31%||48.7% Republican||3.60%|
|Florida||51.2% Republican||3.36%||49.0% Republican||1.20%|
|Georgia||49.5% Democrat||0.24%||50.8% Republican||5.20%|
|Iowa||53.2% Republican||8.20%||51.2% Republican||9.40%|
|Michigan||50.6% Democrat||2.78%||47.5% Republican||0.20%|
|North Carolina||50.1% Republican||1.35%||49.8% Republican||3.60%|
|Ohio||53.3% Republican||8.03%||51.7% Republican||8.10%|
|Pennsylvania||50.0% Democrat||1.16%||48.9% Republican||0.70%|
|Wisconsin||49.5% Democrat||0.63%||47.2% Republican||0.70%|
The Republican party won four of the swing states in 2020, including Florida. However, 2020 was the first year since 1964 that the candidate who won Florida did not go on to win the election.
Five of the states—Arizona, Georgia, Michigan, Pennsylvania, and Wisconsin—flipped allegiance to the Democrats. In Georgia, the margin of victory was as small as 0.24% or about 12,000 votes. Ultimately, winning over these states helped lead to a Biden victory.
Charted: The Number of Democracies Globally
How many democracies does the world have? This visual shows the change since 1945 and the top nations becoming more (and less) democratic.
Charted: The Number of Democracies Globally
The end of World War II in 1945 was a turning point for democracies around the world.
Before this critical turning point in geopolitics, democracies made up only a small number of the world’s countries, both legally and in practice. However, over the course of the next six decades, the number of democratic nations would more than quadruple.
Interestingly, studies have found that this trend has recently reversed as of the 2010s, with democracies and non-democracies now in a deadlock.
In this visualization, Staffan Landin uses data from V-DEM’s Electoral Democratic Index (EDI) to highlight the changing face of global politics over the past two decades and the nations that contributed the most to this change.
V-DEM’s EDI attempts to measure democratic development in a comprehensive way, through the contributions of 3,700 experts from countries around the world.
Instead of relying on each nation’s legally recognized system of government, the EDI analyzes the level of electoral democracy in countries on a range of indicators, including:
- Free and fair elections
- Rule of law
- Alternative sources of information and association
- Freedom of expression
Countries are assigned a score on a scale from 0 to 1, with higher scores indicating a higher level of democracy. Each is also categorized into four types of functional government, from liberal and electoral democracies to electoral and closed autocracies.
Which Countries Have Declined the Most?
The EDI found that numerous countries around the world saw declines in democracy over the past two decades. Here are the 10 countries that saw the steepest decline in EDI score since 2010:
|Country||Democracy Index (2010)||Democracy Index (2022)||Points Lost|
Central and Eastern Europe was home to three of the countries seeing the largest declines in democracy. Hungary, Poland, and Serbia lead the table, with Hungary and Serbia in particular dropping below scores of 0.5.
Some of the world’s largest countries by population also decreased significantly, including India and Brazil. Across most of the top 10, the “freedom of expression” indicator was hit particularly hard, with notable increases in media censorship to be found in Afghanistan and Brazil.
Countries Becoming More Democratic
Here are the 10 countries that saw the largest increase in EDI score since 2010:
|Country||Democracy Index (2010)||Democracy Index (2022)||Points Gained|
|🇬🇲 The Gambia||0.25||0.50||+25|
|🇱🇰 Sri Lanka||0.42||0.57||+15|
Armenia, Fiji, and Seychelles saw significant improvement in the autonomy of their electoral management bodies in the last 10 years. Partially as a result, both Armenia and Seychelles have seen their scores rise above 0.5.
The Gambia also saw great improvement across many election indicators, including the quality of voter registries, vote buying, and election violence. It was one of five African countries to make the top 10 most improved democracies.
With the total number of democracies and non-democracies almost tied over the past four years, it is hard to predict the political atmosphere in the future.
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