The Obama administration is pressing for U.S. ratification of an international nuclear test ban treaty despite dim prospects in the Senate.
Undersecretary of State Ellen Tauscher argued in a speech to arms control advocates Tuesday that the United States no longer needs to test nuclear weapons. She said that ratifying the treaty would strengthen efforts to keep other countries from developing atomic bombs.
President Barack Obama has long backed ratification. But the administration has put other arms control goals ahead of the necessary U.S. Senate approval of the treaty.
The treaty faces stiff resistance from Republicans, and the Senate is unlikely to consider it before Obama seeks re-election next year.