(FILES) In this file photoa ctivists from Amnesty International demonstrate outside the Russian embassy in Berlin, on April 24, 2021, calling for the release of Kremlin critic Alexei Navalny. – The United States is preparing fresh sanctions against Russia over the near-fatal poisoning of Kremlin critic Alexei Navalny, a top White House advisor warned on June 20, 2021. Jailed opposition leader Navalny, President Vladimir Putin’s most prominent opponent, was arrested in January upon returning to Russia after recovering from a poisoning he says was orchestrated by Moscow. (Photo by Odd ANDERSEN / AFP) (Photo by ODD ANDERSEN/AFP via Getty Images)