I was thinking more along the lines of, would being a public official in a public forum imply that the forum administrators can't interject and add their own ed

I was thinking more along the lines of, would being a public official in a public forum imply that the forum administrators can't interject and add their own editorials to his speech either? At least, I can't think of situations where this happens in real life, so it's not clear to me what the implications are.