US maintains nuclear posture despite Russia's doctrine update, White House says

The United States will not change its nuclear posture following Russia's update to its nuclear doctrine, according to a White House spokesperson. The U.S. was not surprised by Russia's announcement, which had been anticipated. Russian President Vladimir Putin has lowered the threshold for a nuclear strike in response to various conventional attacks. This change comes amid claims that Ukraine has used U.S.-made missiles to strike deep inside Russia. The U.S. noted no changes in Russia's nuclear posture and sees no reason to adjust its own. The spokesperson also mentioned Russia's involvement of North Korean troops in Ukraine as a significant escalation.