Where has he stated that?
Article by Vladimir Putin ”On the Historical Unity of Russians and Ukrainians“
Putin approves new foreign policy doctrine based on 'Russian World'
Address by the President of the Russian Federation, February 21, 2022
Address by the President of the Russian Federation, February 24, 2022
Trump certainly thinks so.
Trump claims Putin invaded Ukraine to rebuild the Soviet Union, which he said was 'full of love'