There's plenty of conservative pundits that will eagerly stoke avid Trump supporters rage with innuendo, propaganda, and outright lies. All for anyone with a buck, whether it be Putin (as seen now) or someone else opposed to the status quo.
At this point, I'd hazard that Ernst Blofeld could show up and threaten to nuke every city in America... and 40% of the GOP primary voters would call him the second coming of Jesus.
(and watch the responses, you know someone will say that it'd be okay, because only liberals live in cities)