This may be the third time I've said this, but...
We're our own worst enemy, IMO.
Sometimes I think we're alone. Sometimes I think we're not. In either case, the thought is staggering. ~ R. Buckminster Fuller
We are the only one that is able to successfully keep us from successfully ending / mitigating any of those threats. If the US were to decide to truly dedicate the necessary resources, tomorrow, towards ending the Iranian nuclear program and severely curtailing the Iranian Threat Network, we probably could.
“If we must have an enemy at the head of Government, let it be one whom we can oppose, and for whom we are not responsible, who will not involve our party in the disgrace of his foolish and bad measures.”
- Alexander Hamilton. Spiritual father of #NeverTrump