COVID-19 continues to surge in the United States and elsewhere, propelled by the highly contagious Delta variant. As of this writing (on September 29, 2021), about three quarters (76%) of the eligible U.S. population (age 12 and up) have received at least one dose of a COVID-19 vaccine. This is likely not enough to achieve herd immunity in the United States. Though the specific number remains uncertain, a recent estimate by the Infectious Diseases Society of America suggests that over 80% of the entire population must be fully vaccinated to reach herd immunity.More worrisome, around 1 in 5 Americans, depending on the poll, continue to say they are either uncertain or will not get the vaccine. In our most recent survey wave (fielded from August 26 to September 27, 2021), 10% of respondents who indicated that they are not yet vaccinated claimed they are extremely unlikely to get it. Another 12% are “somewhat” unlikely to seek the vaccine.In recent weeks, the Biden administration has shifted tactics in its efforts to get as many Americans as possible vaccinated. The Administration had from the outset emphasized the benefits of getting vaccinated as its primary strategy for persuading reluctant Americans to do so. Yet, starting in September the prevailing strategy seemingly shifted from emphasizing carrots to sticks. On September 9th, President Biden issued an executive order requiring all federal employees and government contractors to be vaccinated, and also announced that the U.S. Department of Labor would require that all companies with more than 100 employees require vaccination or weekly testing, as well as provide paid time off for employees to get vaccinated. The Biden Administration has also encouraged states and smaller companies to impose similar vaccine mandates.The question arises as to whether the persistence of the Delta variant has increased public support for making COVID-19 vaccines mandatory. In our April/May survey wave, six in ten respondents approved of the government mandating vaccines for everyone (see Report #52). This figure increased modestly, to 64% in our June/July survey (see Report #58).In this report, we update our assessment of public support for vaccine mandates, both nationally and across the 50 states, based on our September survey wave.