This is probably my most controversial stance and I would be happy to admit I'm naive and wrong about this but do we really need Trident? Yes I've heard the arguments but here is my case.
1. Yes nuclear weapons have caused relative peace and at the very least stopped the cold war from getting hot, however getting rid of trident isn't getting rid of all nuclear weapons on the earth.
2. There are plenty of countries such as Japan, South Korea, Germany that are not being being directly supported by nuclear weapons and they don't seem to be under constant threat.
3. We don't live in the 1945 anymore, most countries trade with each other now and trading partners tend not to go to war with each other, nobody would benefit politically or economically from most hypothetical wars.
4. The US nukes can defend NATO countries and act as a deterrent.
5. Investment and jobs could be used elsewhere and couldn't we make nukes later if circumstances do drastically change?