Rubio and Paul have offered divergent views of American foreign policy ever since they were both elected to the Senate in 2010.

On March 6, 2013, Sen. Rand Paul (R- KY) rose to take the floor and speak on the subject of Presi- dent Obama’s nomination of John Brennan for CIA director. Brennan was the architect of Obama’s drone program, which the White House had been using to assassinate terrorists overseas.

Over the course of the next 13 hours, Paul made his objections widely known. From his discomfort with the broad unilateral authority that Obama claimed, to the controversy surrounding targeted killings of American citizens overseas, to the scary potential that military-style drones might be brought to American shores.