Mental health policy rivals border security as a voting priority, study finds

University of Missouri-Columbia

Border security. Inflation. Abortion. These are the issues that dominate election coverage, fuel attack ads, and shape debate questions. Mental health rarely makes that list. But when University of Missouri political scientist Jake Haselswerdt asked voters to actually choose between candidates with competing policy priorities, mental health pulled as much weight as the headline-grabbing topics.

That gap - between what gets covered and what voters care about - is the central finding of a study published in PLOS One.

Forcing trade-offs instead of asking for wish lists

Previous research had already established that most Americans say they support mental health policies. But saying you support something in a survey is easy. The harder question is whether that support has teeth - whether it actually changes how people vote when mental health competes against other priorities.

Haselswerdt, an associate professor of political science in Mizzou's College of Arts and Science, designed his study around that harder question. Drawing on a nationally representative sample of 1,000 adults from the 2024 Cooperative Election Study, he asked participants to choose between candidates who differed on specific policy positions. The design forced trade-offs: you cannot pick a candidate who agrees with you on everything, so which issues do you sacrifice?

The results showed that even small differences in mental health positions could sway voters. When candidates were otherwise comparable, mental health was often the issue that tipped the scale.

An issue hiding in plain sight

Haselswerdt himself was surprised. He went into the study expecting mental health to rank below topics that dominate public discussion. That is not what the data showed. Mental health policy positions influenced candidate choice at levels comparable to issues that receive dramatically more media coverage and campaign spending.

The timing adds context. Recent polling from the National Alliance on Mental Illness shows one in six American adults reporting poor mental health, driven by cost-of-living pressures, health concerns, and the accumulated demands of daily life. The COVID-19 pandemic accelerated awareness of mental health challenges, and that awareness appears to have translated into political salience - the degree to which an issue actually motivates voting behavior, not just opinion poll agreement.

This distinction matters for political strategy. An issue can poll well without driving votes. Voters might tell a pollster they care about mental health but then vote based on taxes or immigration. Haselswerdt's conjoint design specifically tests whether mental health moves votes, and the answer appears to be yes.

What this does and does not tell policymakers

The study's implications for elected officials are straightforward: mental health policy is not just a feel-good issue that gets applause lines in speeches. It is a substantive factor in how at least some voters make decisions. Politicians who take concrete positions on mental health access, funding, and coverage may gain a real electoral advantage - or face a real cost for ignoring the topic.

But the study has important boundaries. A sample of 1,000 adults, while nationally representative, provides limited ability to break down results by demographic subgroups, geographic regions, or political affiliations. Whether mental health policy matters equally to rural and urban voters, across age groups, or within specific partisan coalitions is not addressed in detail.

The study also does not examine which specific mental health policies drive voter preference. Mental health is a broad category encompassing insurance parity, crisis intervention funding, school counselor staffing, substance abuse treatment, and many other policy areas. Voters who say they care about mental health may have very different specific concerns, and what moves a voter in one direction might not work for another.

Conjoint survey experiments, while methodologically strong for isolating issue effects, present simplified choices that do not fully capture the complexity of real voting decisions. In an actual election, party loyalty, candidate personality, economic conditions, and dozens of other factors all interact. The study shows that mental health policy can influence choice in a controlled setting. Whether that influence survives the noise of a full campaign is a separate question.

The gap between voter interest and legislative action

Perhaps the most notable aspect of the findings is the contrast between voter engagement and political attention. If mental health policy genuinely rivals border security in its ability to swing voters, the near-total absence of mental health from campaign messaging, debate questions, and legislative priorities represents a significant misread of the electorate.

One possible explanation is that mental health lacks the partisan clarity that makes other issues useful for campaigns. Border security, gun policy, and abortion have clear partisan valences - voters know which party stands where. Mental health policy does not map as cleanly onto the partisan divide, which may make it less attractive to campaign strategists even if it matters to voters.

Another possibility is that the political infrastructure around mental health - advocacy organizations, donor networks, issue-specific PACs - is simply less developed than for issues that have been central to campaigns for decades. Voter interest may be ahead of the organizational capacity to translate that interest into political pressure.

Haselswerdt's conclusion is direct: political leaders should pay more attention to the mental health crisis. The data suggests voters are already there, waiting for candidates to catch up.