Of course. Number one, you CAN'T get a consistent audio recording like that from a moving bus, unless your subject is fitted with a mic --- which you can see he's wearing, which we already know --- and the mic receiver is also there on the bus, which it is, part of the camera/recording crew
Number two, the Access Hollywood video that that program broadcast SHOWS them all ON that bus, from the inside, where the recording is made. You can see Rump and Bush sitting in a left-side seat with blinds drawn behind them. You CAN'T see any of that without a camera crew sitting across from them
shooting video. And further,
this link, with that video, itemizes everybody who was on the bus, including the camera crew and everybody else. It also describes how the camera crew gets off the bus first, in order to shoot the video of Rump and Bush emerging.
The video of the bus driving in, shot from outside, would be another camera crew. It isn't even necessarily shot at the same time as the audio. That could be overlaid later. It could have been the same camera crew at a different time, just shooting "B-roll".
Rump is sitting in the bus directly across from a camera crew and that's where the "*****" recording is made. That's the recording studio. If he were not, the video of him sitting there --- could not exist. He's fully aware of the camera; he's fully aware that he's wearing a wireless lav mic. You can't fit somebody with a wireless lav mic on their tie or lapel without them knowing it. They have to put the transmitter box in their pocket or clip it to their belt. It's impossible to not know it's there.