Regional News  The European Union has threatened Poland, Hungary, and Slovakia with legal action as the three nations have adopted unilateral bans on the import of Ukrainian grains.  Milling Wheat  Wheat markets adopted a firmer tone last week as CBOT futures rallied on speculation of renewed Chinese buying interest and short-covering. Paris milling wheat futures climbed modestly, while U.K. feed wheat also firmed, aided by a softer British pound. The move higher in Paris and UK futures attracted farm selling, which weakened cash values and pushed futures off their recent highs.  Export competitiveness remains a focal point for traders. The EU Commission kept the bloc’s wheat export projections steady even as produ...