If Russia's economy is kept afloat after 4 years of full-scale war... Why would one year of Trump 2.0 do us in? Don't get me wrong, a whole lot of problematic actions have been taken in that time-frame but that pales in comparison to 1.25 million casualties and about the same number having left the country (and our population is almost triple theirs) on top of infrastructure destruction.

Entirely different cases. Russia never relied on the strong rouble for its economy to function. Or having unfettered access to most of the world's markets. So it had some know-how on weathering the storm.

But OTOH, if Trump is erratic enough to trigger a world-wide de-dollarization trend, and close down markets that were traditionaly open (e.g. Europe), then US would be facing an unprecedented storm that would be much harder to navigate.