Republicans are facing a widening fissure over the U.S. role on the world stage as party leaders decide whether to confront President Obama this week over his policy toward Libya.

House Speaker John A. Boehner (R-Ohio) and other congressional Republican leaders have said that U.S. involvement in NATO's bombing campaign, which hit the 90-day mark Sunday, violates the War Powers Act. The House could seek to cut off money for the war as it takes up the annual Pentagon spending bill this week.

 

Several of the party's potential presidential candidates have called for the U.S. to quit the fight in Libya and questioned the depth of U.S. involvement in Afghanistan.

Other Republicans have begun pushing back, criticizing what they see as a growing isolationist agenda within the party. The result is that Republicans, once relatively unified on foreign policy issues, now have a division that parallels the long-standing split in Democratic ranks.