Yeah, americans always think it is the money.
In fusion we have fundamental problems. They can not be solved with "more research" (aka more money), only with the "right research".
What the "right research" is, we only know partly
More money might broaden the horizon more, but has bottom line no real effect when we will have a working fusion reactor.
Unless someone is willing to pay Uber-Trillions for space travel fusion reactors, this world will never ever have fusion.
Renewables are just cheaper, easier to handle etc. e.g. no nuclear waste. Oh
Fusion research will be dead 20 or 30 years after ITER is running. As long as no one is funding a space program based on fusion, no one will need fusion.