The Secret Service was originally created to hunt counterfeit money, and only started guarding presidents after three assassinations forced Congress's hand in 1901. More than a century later, agents still split their careers between protecting the President and investigating fake twenties. The agency is understaffed by over 20 percent, and burnt-out staff are hitting mandated overtime pay caps by the thousands.

It's already led to scandal, security lapses, and a botched response to the assassination attempt on Donald Trump in Butler, Pennsylvania. Meanwhile, the threats are multiplying and becoming even more complex; domestic militia plots and foreign intelligence operatives are becoming more common. So can an agency stretched this thin actually keep up?