KIEV, Aug. 29 - Two prominent U.S. senators pledged on Monday to redouble efforts to overcome resistance in Congress and repeal a 1970s law hampering trade between the U.S. and former Soviet Ukraine, Reuters reported.

Richard Lugar, Republican head of the Senate Foreign Relations Committee, and Democrat Barack Obama, discussed the 1974 Jackson-Vanick amendment during talks with Ukrainian President Viktor Yushchenko and other leaders.