“The chatter is he's up to something,” says one Florida operative. If Jeb Bush decides to convert his media tour into a presidential bid in a couple years, he won't have to look far for a campaign staff: The well-funded education foundation he runs out his office in a Miami hotel is stacked with former political operatives, a large communications team, and a rapidly growing staff whose work stretches into 40 states. It is common practice for undeclared presidential candidates to build a campaign infrastructure under the guise of a political action committee, but Bush appears to be laying the...