The US simply has more depth in its economy to withstand the negative influence of her politicians. We already see the cliff without the public having much say as to how it will be corrected let alone when. Zimbabwe didn't happen overnight, their economy just didn't have the resilience of many Western ones.
After the land redistribution of President Robert Mugabe the economy collapsed, causing the crazy hyper-inflation that Zimbabwe is notorious for. They are struggling to recover from that disaster, and a government known for looting on a staggering scale, even for an African government. This is actually doing pretty good for them.
Hyperinflation was a separate consequence of the deliberate decision by the state to print money. Yes, the economy collapsed (from that and many other decisions) and they needed more money, but capital is scarce even with infinite money.
" . . . capital is scarce even with infinite money."
You'd think that would be obvious to people running a country, and yet, so many countries have tried it, over and over.