We developed a linear regression model to predict, and then confirm, the Covid-19 herd immunity threshold (HIT) for the US. Having achieved US HIT, new daily cases and deaths are now in their final descent. Therefore, we can now predict how many total Covid-19 related deaths will occur and when daily new deaths will become negligible. After the “mostly peaceful” protests began, some states experienced surges in Covid-19 case counts while others did not. This dichotomy signaled that some states had reached their HIT while others were lagging, thereby providing the basis for a forecasting model of the US HIT....