Under the Miami Herald v. Tornillo case, it was unconstitutional to force a newspaper to run a story the editors would not have included absent a government statute because it was compelled speech which could not pass the strict scrutiny of a compelling state interest being achieved with the least restrictive means necessary to achieve the state interest.
The Miami Herald v. Tornillo case established that forcing a newspaper to publish a story against its editorial judgment is unconstitutional, as it constitutes compelled speech and cannot pass the rigorous scrutiny of a compelling state interest being achieved with the least restrictive means necessary.