Crucial choice for the Americans
Stay in the race or drop out completely. Do or do not- there is no try. And other such sayings.
If the Americans want to maintain a presence in space they need to fund it correctly. If they lose their presence in space, they lose a load of cash, knowledge and prestige- but also "gain" a tiny proportion of their GDP to waste on other stuff.
If they fund it correctly, the Americans could- to paraphrase Battlezone's Wilheim Arkin- "watch the sunrise from the olympus mons while Putin plays with his little orbital bottle rockets".
Personally, I'd hope they keep their presence in space (or that the UK/ESA kicks its ass in the next space race- either's good).