You have managed to derail the conversation away from the science and imply that America is falling behind in space. Claiming the US should be even more dominant in space seems odd given the lopsided reality. Maybe you are invoking American exceptionalism.
I'm not sure why you're looking at space exploration as a competition where we want to dominate. It's not a competition. We should welcome everyone. Even if no one else participates we should still increase our effort, not reduce it. There's so much more to learn.
As I mentioned earlier, this article explains it much better than I could:
