Ukraine has been trying to do that since the coup and installation of Poroshenko...the hater of everything Russian.
To propose this, he must think that virtually the entire world and the march of history is on his side. The praise of his fellow one-worlders has gone to his head.
The thing, Saca —> “Russia” is a plural term.
That’s why the title of the Romanov Tsars was “Tsar of ALL the RussiaS”
The Kyivan Rus before the mongol conquest was a loose confederation named as per Turkic/Slavic cardinal colors: “White” for West (Belarus/Bialorus), Black for north, Red for south etc.).
Muscowy was a creation of Vladimir-Suzdal and from the 13th century onwards was the tax collector for the Great Khans. They took Mongol culture and merged it with Kyivan Rus.
Ukraine, Muscowy and Bialorus are all “Rus” states i.e. east Slavic.