The U.S. Postal Service, one of the nation's biggest employers, is seeking a temporary delay from the Biden administration's order that workers at large companies be vaccinated for COVID-19 or face weekly testing.

The USPS has written the Occupational Safety and Health Administration, which is charged with enforcing the rule, asking for "temporary relief" from having to comply with it, while the issue is before the courts. The Supreme Court on Friday is hearing arguments challenging vaccine mandates.

Deputy Postmaster General Doug Tulino cites supply chain issues in his letter:

Given the significant challenges that our nation's supply chains are already experiencing, we respectfully suggest that the nation cannot afford the additional potential substantial harm that would be engendered if the ability of the Postal Service to deliver mail and packages is significantly negatively impacted.

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