There have recently been news about US protests over Sweden signing an anti-nuclear treaty:
US Secretary of Defence James Mattis sent a letter to Swedish Defence Minister Peter Hultqvist warning the Nordic nation of a negative impact on relations should they sign an anti-nuclear bomb treaty, according to a report in a Swedish newspaper.
However the entire concept of Sweden (which is a nation without nuclear weapons) signing an agreement against nuclear bombs seems silly to me. Non-nuclear nations are definitely not in a position to force the nuclear ones to give up their weapons and since they didn't own nukes in the first place their signature wouldn't really affect anything.
Note that Sweden has already signed the Treaty on the Non-Proliferation of Nuclear Weapons, so they're already committed to avoid developing their own bombs. Hence any new agreements could only be useful if they convince other nations to drop their nuclear programs.
So what's the point of this anti-nuclear treaty? What do the countries signing it hope to achieve?