U.S. Rep Barry Moore (R-Enterprise) has signed onto an amicus brief in a lawsuit against the Centers for Disease Control and Prevention over COVID-19 mask mandates.

Alongside Moore were other conservative members of Congress, including Rep. Thomas Massie (R-Ky.) and Sen. Rand Paul (R-Ky.).

The amicus brief was filed in the U.S. Court of Appeals for the Eleventh Circuit in defense of the Health Freedom Defense Fund, the plaintiffs in the case.

The amici asked the court to affirm the decision of a district court to vacate the CDC's mask mandate because the agency lacked the legal authority to initiate such a measure.

On Twitter, Massie accused President Joe Biden of still trying to force Americans to wear masks on airplanes. He said he and his colleagues sued the CDC, but another case received a prior ruling, so they decided to file the amicus brief.

The CDC's mask mandate, which prohibited "the wearing of masks by people on public transportation conveyances or on the premises of transportation hubs," was put on hold due to a court order in April.

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