Last year I met a doctor that work at the experimental ITER fusion plant. He was pretty optimistic about the technology but totally desperate about budget.
It's an international initiative and US are actually one of the country that pay the least compared to its Income per capita...
By today funding it's clear that real solutions won't be ready until 2050, hence fission is still required in the mix until then. I don't get how people can blinding defend that renewable alone is the answer, because once you do the math it just don't work.