U.S. lawmakers, frustrated by South Sudan violence, question aid

WASHINGTON (Reuters) - U.S. lawmakers expressed deep frustration on Wednesday over the wave of violence in South Sudan, questioning whether it made sense for Washington to continue sending hundreds of millions of dollars in aid to the fledgling democracy.

Four weeks of fighting, often along ethnic lines, has been ringing alarm bells in Washington over the prospect that the conflict could spiral into full-blown civil war, spawning atrocities or making South Sudan the world's next failed state.