evidence: More than four years ago, former President Donald Trump’s administration accelerated the development and rollout of the COVID-19 vaccine. [...] Instead, on at least 17 occasions this year, Trump has promised to cut funding to schools that mandate vaccines. Campaign spokespeople have previously said that pledge would apply only to schools with covid mandates. But speeches reviewed by KFF Health News included no such distinction — raising the possibility Trump would also target vaccination rules for common, potentially lethal childhood diseases like polio and measles. [...] Vaccine opposition has divided the GOP. Florida Gov. Ron DeSantis made opposition to vaccines a core part of his ill-fated campaign for the GOP presidential nomination. In states such as Wyoming and Missouri, pitched primary campaigns centered on anti-vaccine themes this year.