US President Joe Biden has told Congress that Vladimir Putin severely misconstrued how the West would hit back once he attacked Ukraine.
In an early evening discourse, Mr Biden promised "a resolute determination that opportunity will continuously win over oppression".
Liberals and conservatives responded to Mr Biden's allure for show support for Ukraine by ascending as one to cheer.
His Condition of the Association address came as pandemic-fatigued Americans wrestle with dashing expansion.
In a drawn out address to legislators on Tuesday night, the Vote based president said: "Putin's conflict was planned and ridiculous. He dismissed rehashed endeavors at tact.
"He figured the West and Nato wouldn't answer. Also he figured he could separate us here at home."
Mr Biden - whose turbulent withdrawal last year from Afghanistan harmed his prevalence among Americans - added: "Putin was off-base. We were prepared."
He declared that the US would restrict Russian airplane from American airspace, following comparative boycotts by Canadian and European specialists.
What message was Biden shipping off Putin?
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Why Biden will not send troops to Ukraine
The US and it partners have sent off a blast of assents against Russia's economy and monetary framework and Mr Putin himself. In his discourse Mr Biden strayed from his pre-arranged comments by vowing further monetary counter, cautioning Mr Putin: "He has no clue about what's coming."
The US president likewise invited Ukrainian Diplomat Oksana Markarova, who got an overwhelming applause as she sat in US First Woman Jill Biden's celebrity box.