Nobel prize-winning economist Paul Krugman on Sunday said it was "very odd" that Republicans who supported waterboarding would join Sen. Rand Paul's (R-KY) anti-drone filibuster.

Paul began his 13-hour filibuster on Wednesday morning to demand whether the Obama administration believed it could kill a U.S. citizen with a drone strike within the country.

"It was a very weird way to start the debate," Krugman remarked on ABC News' This Week. "I mean, specifically about drones and on American soil? Does that mean it is OK to kill me with a drone while I'm visiting Paris or it's OK to kill me in the United States as long as it's by a sniper but not a drone? It was a very peculiar way to phrase the question."

Krugman added that many Democrats were "uneasy" with the "Bush-created" drone strike program, noting that it gave the President extraordinary power to conduct war. He said liberals were mostly sympathetic to Paul's filibuster.

But Krugman said it was strange for Republicans to be vocally opposed to the drone program while supporting so-called "enhanced interrogation techniques" such as waterboarding. The practice, which was used against terrorism suspects during the Bush Administration, is widely regarded as a form of torture.

"That suggests to me that a lot of people that were a part of this filibuster have a very odd notion of what is right and what is wrong in presidential policy," Krugman concluded.

Watch video, uploaded to YouTube by National Review Online, below: