BIARRITZ, France: Leaders of G7 nations failed at a summit dinner on Saturday to make progress in persuading U.S. President Donald Trump to reissue oil sanction waivers, a European diplomat familiar with the discussion said. BIARRITZ, France: Leaders of G7 nations failed at a summit dinner on Saturday to make progress in persuading U.S. President Donald Trump to reissue oil sanction waivers, a European diplomat familiar with the discussion said.