The CBOT initially looked set for a quiet day of post-holiday trade on Tuesday, but that was before Russian President Putin elevated political tensions in the Black Sea region. Putin threatened to increase attacks on Ukraine in response to Ukraine’s recent attacks on Russian tanker vessels, and the political drama comes as U.S. representatives are meeting with Putin and Russian officials in Moscow this week. That news sent corn and wheat futures higher with bullish chart action and noted bull spreading in corn. The soy complex did not have the same reaction as disappointment over another day without news of exports to China left futures to drift lower. Beyond the Russia-Ukraine developments, there was little fresh news for markets and...