This is not a game. Others will not take it as a game, and will retaliate. You can only play the bully for so long before others start treating you as a bully, and stop backing down, even after you have backed down -- as they never know when you are bluffing.
Doesn’t matter if they’re gone in 6 months. The damage is done, businesses will see the United States as too unstable and unreliable to plan long term goals in. We will pay the penalty for decades. Even if you get a new administration, that administration can be gone in another 4 years.
At least I lived long enough to see the liberals who spent the first 55 years of my life bashing the US (often correctly) for imperialistically stomping all over the rest of the world, using its massive military to force its currency and culture on other nations, and meddling in the elections of sovereign nations to create puppet governments (just to name a few of our favorite activities), turn to pining for the former glory of the US empire.
He's been playing this game for 2 months now with Canada and Mexico, and so far he's loosing. US & business are loosing even more.
Keeping this kind of tarrifs, would be absolutely moronic even by Trump standards. That would be economic and financial suicide for the US.