Trumps a business man, he’s let that play out in public on purpose. Maybe so he can go back to Russia in negotiations and use it as a tool to get a better deal.
He will want that war to end as it is better for the US and world economy. Also the news that the UK could get a trade deal is massive. The EU has Zero growth, the US is going to be driving a lot of growth and we need to tag along with them to boost our own economy that’s why the state visit is important.