U.S. Politics

Midterm Elections and Why Voter Turnout Tends to Collapse

8 min read · Jul 11, 2023

In This Article

Midterms reshape Congress and affect policy just as dramatically as presidential races. So why do fewer Americans show up to vote in them?

Key Takeaways

Midterm elections determine control of Congress, shaping which laws get passed or blocked for two years.
Voter turnout in midterms has historically averaged 10–20 percentage points lower than in presidential election years.
A sitting president's party typically loses House seats during midterms — a pattern political scientists call the 'midterm penalty.'
Lower turnout amplifies the influence of highly motivated, partisan voters at the expense of occasional voters.
Structural factors like off-cycle timing, ballot complexity, and media coverage gaps all contribute to participation drops.

What Midterms Actually Decide

Ask most Americans when the important elections happen, and they'll say every four years. That assumption costs real political power. Midterm elections — held in the even-numbered years between presidential contests — put the entire House of Representatives and a substantial portion of the Senate on the ballot simultaneously.

Whoever controls Congress controls the legislative calendar. A Senate majority determines which presidential nominees receive confirmation hearings. A House majority decides which bills ever come to a floor vote. That makes midterms an effective check on presidential authority — and a genuine redistribution of political power — every two years.

For a deeper look at the terminology surrounding these processes, see a plain-language guide to political terms that explains concepts like cloture, reconciliation, and the filibuster.

The Turnout Gap: How Large Is It?

The gap between presidential-year and midterm turnout is substantial and consistent. According to the U.S. Elections Project, which tracks voter participation data, voter-eligible turnout in recent presidential elections has reached approximately 60 percent or above, while midterm turnout has generally hovered between 40 and 50 percent. In some earlier midterm cycles it fell below 40 percent.

That translates to tens of millions of Americans who participate in choosing a president but then sit out the elections that determine whether that president can govern effectively.

~50%

Typical midterm voter-eligible turnout

According to the U.S. Elections Project, voter-eligible participation in recent midterm cycles has generally ranged from roughly 40 to 50 percent, compared to above 60 percent in presidential election years.

3 in 4

Midterms where president's party loses House seats

Historical data spanning post-World War II elections shows the president's party has lost House seats in approximately three out of every four midterm elections.

~20 pts

Turnout gap between presidential and midterm years

The difference in voter-eligible turnout between presidential and midterm election years has frequently exceeded 15–20 percentage points in recent decades, per U.S. Elections Project data.

The pattern is not uniform. Turnout tends to be higher in competitive states, during periods of heightened political polarization, and when major policy issues — healthcare, the economy, immigration — are prominently in play. The 2018 midterms, for example, saw historically elevated turnout for a non-presidential year.

Why Voters Stay Home

Political scientists and election researchers have identified a cluster of overlapping reasons for the midterm turnout collapse. They are not all equally fixable, but understanding them helps clarify what the participation gap actually reflects.

No Presidential Race at the Top of the Ballot

Presidential contests generate enormous media coverage, advertising spending, and social attention. That visibility functions as a mobilization signal — it reminds people that an election is happening and raises the perceived stakes. Without a presidential race anchoring the ballot, many voters simply don't register that an election is approaching.

The "It Doesn't Matter" Misconception

Many non-midterm voters express the belief that congressional elections are lower-stakes. In practice, legislative control over spending, investigations, and confirmations means the opposite is often true. This belief is challenged directly in widely believed myths about how U.S. elections work.

Structural and Access Barriers

Weekday-only polling, limited early voting options in some states, strict ID requirements, and complex ballots featuring multiple races and ballot measures create friction that suppresses turnout among less politically engaged voters. These structural factors tend to affect lower-income and younger voters most acutely.

The Role of Primaries

Midterm general election outcomes are also shaped well before November. Many congressional districts are drawn to be reliably partisan, meaning the real contest happens in the primary. Primary elections versus general elections explains why so many races are effectively decided before most voters pay attention.

What Low Turnout Means for Policy Outcomes

When fewer people vote, the composition of the electorate shifts. Older, more partisan, and more ideologically motivated voters make up a larger share of the midterm electorate than of the presidential-year electorate. That tilt influences which candidates survive primaries and which general-election messages resonate.

Districts and states where one party dominates have their congressional representatives effectively chosen in primaries, often by a small fraction of registered voters. Redistricting — the once-a-decade redrawing of district lines — reinforces these dynamics by concentrating partisan voters in ways that reduce competitive general election races.

The downstream effect on policy is direct. A Congress shaped by low-turnout midterms may look meaningfully different from one that reflects the full voting-eligible population. Funding priorities, regulatory oversight, and legislative compromises all follow from who holds congressional majorities — majorities often decided when fewer than half of eligible Americans cast a ballot.

This article is intended for general informational purposes. Election rules, dates, and procedures vary by state. Readers should verify registration requirements and polling information with their state or local election authority.

What is decided in a midterm election?

All 435 U.S. House seats and approximately one-third of Senate seats are on the ballot, along with many state-level races including governorships, state legislative seats, and ballot measures. The combined results determine which party controls Congress, which directly affects the president's legislative agenda.

Why is midterm voter turnout so much lower than in presidential years?

Research points to several overlapping causes: less media attention, the absence of a high-profile presidential race at the top of the ballot, voter fatigue, and the mistaken belief that midterms are less consequential. Structural issues like weekday-only voting and complex ballots also create participation barriers.

Does the president's party usually lose seats in midterms?

Historically, yes. The president's party has lost House seats in roughly three out of every four midterm elections since World War II. Political scientists attribute this to voter dissatisfaction with the party in power and an enthusiasm gap among the opposition.

How do midterm results affect everyday policy?

A shift in congressional control can halt a president's legislative priorities, trigger new oversight investigations, reshape budget negotiations, and change which bills ever receive a vote. The effects touch areas like healthcare funding, tax policy, and foreign aid.

When are the next U.S. midterm elections?

Midterm elections occur every four years between presidential cycles — the next ones following the 2024 presidential election will be held in 2026. Specific primary and general election dates vary by state, so voters should confirm dates with their state or local election authority.

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