Since his appointment as secretary of health and human services, Robert F. Kennedy Jr. has maintained a relatively low profile, leading a coalition called Make America Healthy Again (MAHA) that has faced significant challenges and setbacks. Despite initial expectations that his tenure might bring substantial shifts in health policy, the coalition’s impact so far remains limited, amid mounting internal divisions and external obstacles.

Kennedy, known for his skepticism regarding vaccines, has not succeeded in substantially altering federal vaccine policies. Changes implemented have largely been minor, such as adjusted recommendations that states often overrode. Meanwhile, MAHA’s efforts on food safety and environmental health issues have encountered resistance from Trump administration appointees with close ties to business interests. Notably, the administration supported the manufacturer of the herbicide Roundup in a high-profile Supreme Court case concerning claims that its product caused cancer, marking a notable defeat for MAHA-backed plaintiffs. Federal agencies have also approved expanded use of chemicals referred to as “forever chemicals” in pesticides and drinking water, counter to the coalition’s stance.

Structural challenges constrain the coalition’s influence within government agencies. After a 25 percent reduction in staffing at the Department of Health and Human Services (HHS) last year, key leadership positions remain unfilled, including heads of the Centers for Disease Control and Prevention (CDC), the Food and Drug Administration (FDA), and the National Institute of Allergy and Infectious Diseases. The absence of confirmed directors at several FDA centers further complicates regulatory oversight, leaving the agency with significant gaps in expertise and capacity.

Within MAHA, disagreements persist over fundamental questions about drug regulation, vaccine development, and standards of scientific evidence. Debates continue about whether pharmaceutical products are subject to excessive or insufficient regulation, and tensions remain between proponents of randomized controlled trials and advocates of alternative or anecdotal approaches to health interventions. This ideological fragmentation has undermined the coalition’s coherence and limited its ability to enact unified policy changes.

Public opinion surveys reflect these complexities. While MAHA claims to echo widespread American concern about environmental toxins and food contaminants, the coalition’s anti-vaccine rhetoric conflicts with broader public attitudes. According to recent polling by the Kaiser Family Foundation, a significant majority of self-identified MAHA parents—86 percent—affirmed the importance of routine vaccinations, a figure that exceeds the overall national vaccination acceptance rate. Nationwide, vaccination rates among kindergarten children remain above 90 percent. Even in areas affected by measles outbreaks, vaccine uptake has rebounded.

The legacy of the COVID-19 pandemic continues to shape perceptions of public health authority. Although trust in scientific institutions declined markedly during the pandemic—from 77 percent expressing trust in the CDC before Kennedy’s appointment to 50 percent a year later—a majority of Americans (77 percent) still report having at least “a fair amount” of confidence in scientists acting in the public’s interest. This suggests that while skepticism toward specific agencies has grown, broad trust in science endures.

Political dynamics further complicate the narrative surrounding MAHA and pandemic backlash. Despite reports of declining institutional confidence, incumbent governors running for re-election in 2020 and 2022 overwhelmingly retained their positions, and by 2024, COVID-19 policy had largely faded as a focal issue in political campaigns. Polling indicates that substantial majorities continue to support core pandemic mitigation measures such as mask mandates, social distancing, remote work, and temporary school closures, even with the benefit of hindsight.

Overall, the Make America Healthy Again coalition under Robert F. Kennedy Jr.’s stewardship remains fragmented and constrained. Its influence has been diluted by internal divisions, diminished federal leadership capacity, legal defeats, and public attitudes that have not shifted dramatically away from established health policies. Whether the coalition can maintain cohesion and expand its impact in the current political and institutional environment remains uncertain.