If the US carries on intent on fighting wars whenever what is happening is not what it wants as we can see with Ukraine against a nuclear power, then in the future there would eventually be nuclear war. However we would need to wait and see if that is how they choose to go.
IMO there is another area where the US may destroy the world and this I think is a bigger danger than nuclear war. By the Right in the US refusing to acknowledge climate change we are not making the advances we need to. If they did take it seriously and have the courage to look at things then we would find that Biden would not be fighting this needless war in Ukraine. He would be working to save the world so I guess that makes both parties of the US, the people who almost certainly are going to be responsible for such serious destruction in the world that society as we know it will no longer exist and with the strong likelihood that human beings like most others will become an extinct species. All because some people for their own reasons created a false counter argument to the climate people and others they chose to believe this because they found it just too scary to face the truth - I take it that is why they are always saying people who accept reality are scared.