Re: The President has a cronic medical condition
I'm sure they'd account for something like that, but I don't know how far out of their standard tactics they need to go. It wouldn't really be any different than the times you see any other president take his time shaking hands on a street or something.
And really, its how fast the agents act that would save him, not how fast he reacts. If you've ever seen the clip of the attempted assassination on President Reagan, he's pretty much shot, picked up and thrown into the car by the Secret Service guys, and jumped on by the Secret Service guys before he has a chance to do anything.
In game terms, your Secret Service guys should just have the maximum level of Lightning Reflexes you allow normal people to have in your game. Maybe even some kind of Human Shield power, depending again on what you allow. It might be built as a kind of Damage Reduction or Armor, Usable By Others, Trigger (when you see/hear an assassin), Lim: Only When Adjacent, Lim: You Take the Damage reduced. It would only help on the first shot if you saw the assassin before he struck, but would be good after you knew what was going on. Pretty much like real life, I guess.