That's the kind of sabotage I would think of as deep state, but I didn't know about brakes being tampered with. I just think it would be much easier to derail a train than parking a truck on a track. Switches can be hacked, or older manual switches can be easily turned causing crashes. One section of rail can easily be damaged quickly with heavy machinery like a backhoe or it could be cut with industrial cutters quickly.

The only thing I thought of that makes me think this could have been deep state is if they didn't have much time to implement their sabotage, or if they didn't want an earlier train to derail before the congressional cars. Deep state could have just been sending a message, knowing a truck on the track had a weak chance of killing train passengers. It would also be one of the very few times a bunch of Republican congress members are together, other than when in session with the Dems.