Eh, kinda. The largest uranium reserves in the world are in Australia, and the highest grade uranium deposits are in Canada. The western US has large reserves that don't require international trade (though they're mostly in federally protected land so it would take a lot of government action to actually start mining it).

That said, Kazakhstan does the most uranium mining at the moment by a wide margin and they're not exactly a shining example of democracy. They're responsible for 25% of US uranium imports.

Some of the largest deposits of uranium in the world are in Brazil, not currently a dictatorship, but also not being mined.