Weather concerns and the impacts of the war in Iran helped push wheat and corn to sharp gains Tuesday, with both markets blowing past key technical resistance levels. The weather is now coupled with geopolitical tensions that look increasingly hard to resolve, which is giving funds the perfect platform for jumping into grains. The combined influence is of critical importance for the ag markets as the geopolitical component can support greater and more prolonged fund interest than a typical weather market. This rally is occurring amid large U.S. corn and world wheat supply expectations and is giving producers some excellent grain marketing opportunities.  Outside Markets  U.S. stocks were weaker on Tuesday as weakness from the tech...