Pushback is happening over vaccine requirements and mask mandates.
The United States is facing a COVID-19 surge this summer as the more contagious delta variant spreads.
More than 615,000 Americans have died from COVID-19 and over 4.2 million people have died worldwide, according to real-time data compiled by the Center for Systems Science and Engineering at Johns Hopkins University.
Just 58.4% of Americans ages 12 and up are fully vaccinated against COVID-19, according to data from the Centers for Disease Control and Prevention.
The CDC last week, citing new science on the transmissibility of the delta variant, changed its mask guidance to now recommend everyone in areas with substantial or high levels of transmission -- vaccinated or not -- wear a face covering in public, indoor settings.
The Transportation Security Administration screened 2,238,462 people at U.S. airports on Sunday, the highest number since the start of the pandemic, the agency said. The continued spread of the highly contagious delta variant has not stopped travelers this summer and the TSA put out a tweet reminding fliers to mask up and socially distance.
-ABC News’ Sam Sweeney
