WARSAW, Poland (Reuters) -- U.S. President Joe Biden said that Russia's leader Vladimir Putin "cannot remain in power" in Poland Saturday, remarks a White House official said later were meant to prepare the world's democracies for extended conflict over Ukraine, not back regime change in Russia.
Biden's comments, including a statement earlier Saturday calling Putin a "butcher," were a sharp escalation of the U.S. approach to Moscow over its invasion of Ukraine.
