If you’re referring to Ukraine as one of the two, we already heavily reduced our support under Trump and there is no chance in hell that removing the leftover support causes Ukraine to capitulate by tomorrows, especially after recent territory gains and destruction of Russian logistical supply lines with Wildberries and their refinery infrastructure.

Also if the other is Iran, lol at “stopped supporting respective belligerents” as if the US itself was not one of the major belligerents.

I think the other example is Israel which seems like the much more obviously belligerent, actively colonial nation state that the US is largely propping up (and wouldn't exist otherwise)

also, arguably, the half-century of creating, establishing, funding, and build-up of NATO largely supersedes the point that Trump cut spending there temporarily. that all came from American coffers and the current conflict there is a long hangover from that