By Imprisoned Russian opposition leader Alexei Navalny (shown here in the Babuskinsky District Court in Moscow in February 2021) is in failing health because of a new suspected poisoning and is back in a punishment cell after a few days in regular confinement, a spokeswoman said Wednesday. Alexander Zemlianichenko/APMOSCOW — Imprisoned Russian opposition leader Alexei Navalny is in failing health because of a new suspected poisoning and is back in a punishment cell after a few days in regular confinement, a spokeswoman said Wednesday. He is allowed to write letters or have his lawyers visit occasionally