Robotic assassination campaigns directed from the Oval Office. Cyber espionage programs launched at the president's behest. Surveillance on an industrial scale. The White House already has an incredible amount of power to monitor and take out individuals around the globe. But a new wave of technologies, just coming online, could give those powers a substantial upgrade. No matter who wins the election on Tuesday, the next president could have an unprecedented ability to monitor and end lives from the Oval Office.