Top Senate Republicans disagreed Sunday over who should authorize drone strikes on Americans suspected of terrorism.

Sen. Rand Paul, R-Ky., affirmed his position that a federal court, not President Obama, should make the decision, while Sen. Lindsey Graham, R-S.C., told “Fox News Sunday” that having a court decide would be “the worst thing in the world.”

The issue of using unmanned aircraft, known as drones, has been a controversial issue since Americans learned last year that Obama was secretly and personally ordering such strikes.

The issue returned to the forefront last week when the president agreed to give House and Senate intelligence committees access to a classified legal opinion on using drones to kill U.S. terror suspects on foreign soil.