But upon entering office, Trump will likely still be faced with something far more challenging as he confronts what has become the greatest European killing field since World War II—the cauldron on the Ukrainian border that has likely already cost 1-1.5 million combined dead, wounded, and missing Ukrainian and Russian soldiers and civilians.

There is no end in sight after three years of escalating violence. But there are increasing worries that strategically logical and morally defensible—but geopolitically dangerous—Ukrainian strikes on the Russian interior will nonetheless escalate and lead to a wider war among the world’s nuclear powers.