Sen. Rand Paul's (R-Ky.) filibuster appears to have exposed a divide in the Republican Party, with the party's two top foreign policy hawks -- Sens. John McCain (R-Ariz.) and Lindsey Graham (R-S.C.) -- taking to the floor Thursday to denounce Paul's effort in stark terms.


Sens. John McCain (R-Ariz.), Lindsey Graham (R-S.C.
AP)

McCain and Graham said they support the president's right to use deadly force -- including drones -- against U.S. citizens on U.S. soil who are engaged in terrorism, when there aren't other options available.

Graham even labeled Paul's effort -- which was joined by more than a dozen Senate Republicans -- as "ill-informed."