In June 1974, Senator Henry M. Jackson informed Chairman of the Senate Armed Services Committee that he had arranged for Thurmond to cosponsor an amendment revising the present export control system and restricting trade with the Soviet Union while granting the Defense Secretary power to veto any export that might "significantly increase the military capability" of either the Soviet Union or other Communist countries. Jackson introduced the amendment after Howard M. Metzenbaum yielded the Senate floor before Majority Leader Mike Mansfield caught on to the proposal and succeeded in preventing an immediate vote.