Confusion overa possible U.S. military role in Bosniagrew as President Clinton and Congress clashed. While Senate Majority LeaderBob Dole renewed his call for a complete withdrawal of all UN peacekeepers, as well as a lifting of the international arms embargo,Sen. Jesse Helms (R-NC), chairman of the Senate Foreign Relations Committee, blasted the President's statement that he may send U.S. Marines into Bosnia as "completely unacceptable." In the face of the withering criticism, Clinton backed away from his announcement yesterday that Marines might land if the UN requests their help in rescuing UN hostages, now saying instead that he would be "inclined" to order in the Marines if asked. Meanwhile, Bosnian Serbs defiantly upped the ante by taking another UN hostage today.