You won't hear any of the President's team at all. All comms are encrypted. You might hear his helicopter comms coming and going (if he uses the helo) but, if he comes by car, you'll hear nothing. You will hear police escort activity during the entire visit though. Local police will be escorting, controlling vehicle traffic, etc during the entire visit and comms will remain at the local jurisdiction on whichever freqs they would normally use for that location. In Baltimore, it might involve the Special Event freqs I would think.