no one. thats why its funny to read U.S media talk about "china is increasing its navy and army, boogey man blah blah" nikka it would take them 50-75 years to catch up, and thats with the U.S military having a complete halt on production.
not gonna happen. Only way we can lose is if someone like Putin just says fukk, kill us all, and launches nukes destroying everyone in the process. Russia has more land so they'd win/be the last man standing. just send a big chunk of the population to Siberia. Its not like the Russians arent hard as fukk, and cant survive it.
America on the other hand, no electricity and food for 5 days, we'd turn to cannibalism. we aint about that life.