Jimmy Carter liked to keep the nuclear launch codes in his Jacket Pocket, and one time he left them there when he got his jacket dry cleaned...
What if a cleaner checked the pockets and either took or copied the codes?
How much peril would America (or the world) be in?
Another time the football could have been intercepted was the 1981 Reagan assassination attempt, his clothing was cut off and separated from himself. In a twist I like to call "Operation Cornerback" the aid holding football was separated from the president, in the confusion, he could have been overtaken, and the other element recovered as it was left unguarded.