"Warms to" is English (maybe primarily American? Not sure) slang for "begins to consider in a positive light". https://idioms.thefreedictionary.com/warm+to+(som

"Warms to" is English (maybe primarily American? Not sure) slang for "begins to consider in a positive light". https://idioms.thefreedictionary.com/warm+to+(someone+or+something) https://idioms.thefreedictionary.com/warm+to+(someone+or+som... So yeah, as the others said: the Biden administration was initially uneasy about helping Ukraine take back Crimea, but is starting to consider providing assistance for doing that.