A Russian court issued an arrest warrant on Tuesday for opposition politician Yulia Navalnaya, who lives in exile abroad, on allegations of being involved in an “extremist organization.” Yulia Navalnaya is the widow of Russian opposition leader and frequent Kremlin critic Alexei Navalny, who died in February in a prison camp north of the Arctic Circle in unexplained circumstances. A court spokesman in Moscow announced that the court had granted the public prosecutor’s request for pre-trial detention, according to Russia’s Interfax news agency. The pre-trial detention is initially set for two m…