"Step one would be to return the Polish territory taken by the Ukraine at the end of World War II."Probably as soon as Poland returns the German areas that Stalin alloted to it.
"Most of the folks there are Catholic, and it would be a good fit."ROFL. The same Greek-Catholic folks who are, then and today, some of the most outspoken Ukrainian Nationalists? They same folks who took an active part in an insurgency going against the Poles prior to WWII and during the war, massacred up to 100K Polish civilians? https://en.wikipedia.org/wiki/Massacres_of_Poles_in_Volhynia_and_Eastern_Galicia Sure they hate the Russians (#1 enemy) now, but Poles were always #2 on that list.
The Greek-Catholics are less than 10% of the population. Throw them in with the Russians.