Dmitri Medvedev threatens Poland and exposes Russia

His all-too-open letter to the Poles and what it means today

Today President Joe Biden is in Warsaw to meet with Polish leaders and talk to Ukrainians who have fled the Russian invasion.  The U.S.-Polish relationship was strained before Russia invaded Ukraine, and has had its awkward moments during the war.  But Poland is an important NATO ally, has an army that matters, and has taken about two million refugees f…