I recall it as a paperback novel from the late 80s or early to mid 90s. Maybe 200-300 pages (so I don't think it was part of an novella anthology, but perhaps I'm misremembering it).
It involved a plot where the main conflict was preventing others from changing how history was reported in current times. One memorable example was that George Washington now had a scandal coming to light, but it was a planted story by the antagonists. The story had a definite sci-fi plot rather than a mere future dystopia (like "1984").
I had thought Orson Scott Card or perhaps William Gibson or Neal Stephenson had wrote it, but haven't found evidence of it by them and cannot find it among my collection.
Sorry I wish I recalled more to go on.
Anyone remember what it might be? Thx!