Nuclear works well with renewables. It provides reliable base load while the renewables and batteries can be used on top of that. Plus the fuel can be sourced from friendly nations like Canada.

Also worth noting that 15 years is a long time. SMRs are starting to be built and France is planning to build a bunch of nuclear capacity in the near future which might mean the possiblity to import cheap energy or leverage the human resources from those builds.

No no those other countries will pay the tariffs.