Meanwhile, Obama has defended his decision to intervene in Libya, saying the mission is in support of an "international mandate" with a limited, humanitarian scope. The president has also said the U.S. military would only be actively involved for "days, not weeks" before other allied partners take on a leading role.
But Sen. Richard Lugar of Indiana, the top Republican on the Senate Foreign Relations Committee, said this week that regardless of the president's intentions the costs to taxpayers -- and potentially in American lives -- coupled with an uncertain outcome make the military intervention unwise.
"It's a strange time in which almost all of our congressional days are spent talking about budget, deficits, outrageous problems. And yet same time, all of this passes -- which is a very expensive operation even in a limited way, always is," Lugar said Sunday.
ABC News' Luis Martinez contributed to this report.