Former Vice President Mike Pence’s group Advancing American Freedom filed an amicus brief urging the Supreme Court to oppose President Biden’s vaccine mandate. Pence’s group argues in the brief that Biden’s employer vaccine mandate violates the constitution surpasses previous examples of the Occupational Safety and Health Administration’s (OSHA) use of emergency authority.

The Hill reports:

“America is about freedom and the ability to make the best decision for your family or business, and Joe Biden’s vaccine mandate must be stopped in its tracks in order to preserve freedom, protect American livelihoods and businesses, and to safeguard our constitution,” Pence said in a statement.

The brief outlines nine previous cases where OSHA used an emergency temporary standard to expedite the standard rule-making process. Pence’s brief argued there is a distinction in that the previous instances sought to regulate workplace dangers like asbestos or other chemicals that threatened workers’ safety, not require employees to get vaccinated or get some other medical treatment.

The brief from Pence’s group argues that the OSHA rule requiring vaccinations suggests “the Biden Administration is not truly seeking to mitigate workplace hazards through the [emergency temporary standard], but rather is attempting to use OSHA to accomplish an end that it has been unable to persuade Congress to support: the mandatory vaccination of the American public.”

Pence’s group has previously filed amicus briefs with the Supreme Court outlining positions on prominent cases on abortion and school choice. The former vice president is the latest conservative politician to weigh in against the Biden administration’s push for large businesses to require vaccinations or regular testing for employees as part of an aggressive strategy to end the pandemic.

President Biden’s vaccine mandate brought on a series of legal troubles against the order. Now, many are looking to the Supreme Court to rule on the controversial order.