India, July 11 -- Joe Rogan, the influential podcast host whose late-stage endorsement provided a vital cultural anchor for Donald J. Trump's 2024 presidential campaign, has issued a scathing indictment of the administration's military campaign in Iran, warning that the intervention could alienate the populist coalition and hand the White House back to the Democratic Party in 2028.

Rogan's remarks, delivered during a broadcast of The Joe Rogan Experience, represent the most significant defection yet from the media vanguard that propelled the president back to power. The comments directly target the administration's pivot toward an expansive, grinding conflict in the Middle East-a strategic shift that critics argue stands in stark defianc...