As the U.S. Supreme Court prepares to hear arguments over the Biden administration’s vaccine mandates, there is not just a familiar division between business and workers in the amici briefs, but division within their own ranks as well, over the legal and social policy issues.

The justices on Friday will hear expedited arguments in challenges to the administration’s vaccine requirement for health care workers at federally-funded Medicaid and Medicare facilities, and its vaccinate-or-test rule for employers with 100 or more employees.