Was Aleksei Navalny's poisoning an outright assassination attempt? If so, why? Why now? And by whom? Is it in the Kremlin's interest to kill the opposition leader? Wouldn't that make him a martyr? Or maybe one of Russia's notorious intelligence agencies decided they would just take matters into their own hands? And is Navalny now the most formidable political challenger to Russian President Vladimir Putin? Mark Krutov of RFE/RL's Russian Service joins guest host Mike Eckel to discuss Navalny’s condition, and his future.