Washington (CNN) - The ranking member of the Senate Foreign Relations Committee on Monday criticized the mission underway in Libya saying "there are no guidelines for success."
In an interview set to air Monday on CNN's "John King, USA," Republican Sen. Richard Lugar of Indiana said the operation has not been clearly defined.
In recent days the Senate's most senior Republican has expressed concern over action in the African country, and on Sunday said the U.S. cannot afford another war.
"The fact is we cannot afford more wars now, and we're going to have to find in fact some curtailment of our military budget in addition to the so-called spending that we do, the 30 percent that we've been dealing with," Lugar told CNN. "There's another 70 percent out there and defense is a big part of it. In the midst of that, we have to be thinking carefully what our obligations are, how long they might continue."
His comments are more critical of the action than other Republicans, including Sen. John McCain of Arizona and Sen. Lindsey Graham of South Carolina, who have raised concerns but remain supportive of U.S. involvement.
- Watch the full interview on CNN's "John King, USA" at 7 p.m. ET