This split seems more likely by the day.
But it won't help Russia, because Europe will pull together and increase aid to Ukraine, and I seriously doubt Americans really want this split. So in the most extreme case, Trump will be removed, and things will hopefully normalize.
But I think the split will indeed get worse before it returns to normal again.
I bet at least 90% of American politicians are very well aware who their true allies are, and it's not the dictators Trump wants to work with.
STOP THREATENING!!!