The Trump administration's 2026 health care agenda, steered by HHS Secretary Robert F. Kennedy Jr.'s Make America Healthy Again (MAHA) movement, is experiencing significant internal friction. While Kennedy has focused on eliminating food additives and overhauling dietary guidelines, his public messaging has notably omitted the administration's controversial shrinking of childhood vaccination schedules and changes to a key vaccine advisory committee. This omission highlights a growing divide within MAHA, as some supporters, particularly environmental advocates and vaccine skeptics who helped launch Kennedy's political career, feel their priorities are being neglected.

Online criticisms have emerged from some of Kennedy’s former employees and supporters, who accuse top Trump administration advisers of undermining MAHA's original goals. These criticisms became so pronounced that Kennedy felt compelled to publicly defend his colleagues. The core of the dissatisfaction lies in what these original supporters perceive as inadequate action on their key issues and a troubling willingness by the Health Department to collaborate with pharmaceutical companies and tech firms, entities whose motives they deeply distrust.

These internal rifts are complicating the Trump administration's broader efforts to reform America's public health system ahead of the midterm elections, making vaccine politics a significant challenge. The Food and Drug Administration's initial reluctance to review Moderna’s new mRNA flu vaccine application, followed by a reversal reportedly due to White House pressure, further underscores the political sensitivities surrounding vaccine-related policies. The growing discord within MAHA threatens the cohesion of a movement that was intended to be a strong ally for President Trump.