Comment Pakistan, Israel (Score 1) 228
Pakistan has nuclear weapons (and India has the Mahatma Gandhi Memorial Nuclear Bombs as well), but aside from their border conflicts around Kashmir (for which the nukes make war less likely but more risky), their big invasion problem is non-governmental forces like Taliban, for whom nukes are really no use at all.
And Israel, of course, has the bomb (probably also the hydrogen bomb), but you're not allowed to say that in discussions about whether Iran can make one also. Wouldn't be a total surprise if the Saudis had it too.