The implications of a shift in US policy would be felt beyond Ukraine’s border and would particularly worry those European states that neighbour Russia.
Further afield, other American allies may decide the US is not a reliable security partner. One US senator raised the prospect of Japan developing its own nuclear arsenal if America stops helping Ukraine. Tokyo, he told me, could decide the American nuclear security umbrella simply has too many holes in it.
There’s also the prospect that a re-elected President Trump would act on his desire to pull America out of Nato, effectively crippling the military alliance. Two people with ties to the Trump campaign have told me he does plan to do just that.
Europeans, says Senator Coons, are right to be anxious.
“The US and its European allies have a significant common challenge. Together we have to show the world that Putin can’t outlast us and that [Chinese] President Xi’s vision of authoritarianism is not the best for the world.”