According to this page, the USA accounts for approximately one third of the total world cases and world deaths. The measures per million population helps to make useful comparisons.

COVID-19 Coronavirus Pandemic

Country, Other        Total Cases        New Cases        Total Deaths        New Deaths        Total Recovered        Active Cases        Serious, Critical        Tot Cases/1M pop        Deaths/1M pop        Total Tests        Tests/1M pop
World         2,306,639         +57,776         158,826         +4,681         590,386         1,557,427         55,189         296         20.4                 
USA         726,861         +17,126         38,200         +1,046         63,955         624,706         13,544         2,196         115         3,661,500         11,062
Spain         191,726         +887         20,043         +41         74,797         96,886         7,371         4,101         429         930,230         19,896
Italy         175,925         +3,491         23,227         +482         44,927         107,771         2,733         2,910         384         1,305,833         21,598
France         147,969                 19,323         +642         35,983         92,663         5,833         2,267         296         463,662         7,103
Germany         142,797         +1,400         4,416         +64         85,400         52,981         2,922         1,704         53         1,728,357         20,629
UK         114,217         +5,525         15,464         +888         N/A         98,409         1,559         1,682         228         460,437         6,783

[The above is just the first few countries on the list.]

If you want to measure the consequences of political decisions, this spreadsheet is a good starting point. If you click on the hyperlink for a specific country it shows more detailed data and also charts. The deaths on the U.S. charts are still going almost straight up. Compare that with Australia and we have flattened the curve by socially isolating and other measures. We also have a health system designed to look after everyone, not just the wealthy. It's not perfect but it seems to be effective.