Somebody needs to follow those busses report about where they originate from, and interview the people as they get off.

I get the feeling that the MSM can read the writing on the wall so they're turning on her hoping to retain some level of credibility with those that still trust them

If the busses are being used to efficiently transport actual supporters e.g. to a parking area away from the rally, then there's nothing shady about this.

If they're actors, then yeah, that's another story.