GUESTS: TBA The Comprehensive Test Ban Treaty failed to win ratification in the Senate last night in a largely partisan vote. President Clinton has vowed that the fight for ratification is not over, but the vote marked a dramatic defeat for his administration. The vote has elicited concern and condemnation around the world. What are the likely political effects of the vote on Clinton's authority, and on the elections in 2000? Will there be any long-term impact on worldwide nuclear proliferation? Join Melinda Penkava and guests for a look at the ramifications of the Senate's rejection of the Nuclear Test Ban Treaty.