However things are about to get *very* bad in the US, much worse than they are in Lombardy.
Although that prediction may still come to pass, the early data doesn’t indicate it.
Ten days ago, US mortality from COVID19 was about at the worldwide average (3.5%-ish). Since then, worldwide mortality has moved upwards (now around 4.25%) while US mortality has crashed (now down around 1.2%, last I checked).
When this is over, we can argue about why our mortality rate was either low or high, and point fingers at each other. But as of this moment, we are responding well based on OUTCOME (which is really all that matters, in the end.)
(However, generally speaking, I would suggest to you that liberal democracies in general, whether they use a bicameral or parliamentary system, are not nimble when faced with crisis, based on their very structure.)