President Vladimir Putin announced changes to Russia’s nuclear doctrine to deter Western support for Ukrainian attacks on Russia, the Kremlin stated. The U.S. and EU condemned these changes as “irresponsible.” Kremlin spokesman Dmitry Peskov emphasized the revisions as a warning to countries aiding attacks on Russia. Putin indicated that any conventional attack on Russia supported by a nuclear power would be seen as a joint attack, potentially lowering the threshold for nuclear response. U.S. Secretary of State Antony Blinken and European Commission spokesman Peter Stano criticized Putin’s statements as reckless.