The nation may have gotten a little taste of 2016 Republican presidential politics Thursday as Sen. Rand Paul of Kentucky squared off with Sen. Marco Rubio of Florida on foreign policy, Roll Call reports.  

At a Senate Foreign Relations Committee markup, Paul, a potential 2106 presidential candidate, offered an amendment setting geographic limits to an Authorization for Use of Military Force cleared by the committee that would set parameters on the nation’s fight against the terror group known as Islamic State, ISIS, or ISIL.  

The amendment failed on a 13 to 5 vote. But the preceding debate, which was respectful, saw Paul and Rubio, who may also seek the Republican nomination for president, disagree over how much Congress should rein in the commander in chief.