Arizona's attorney general filed a lawsuit Tuesday that seeks to invalidate President Biden's latest COVID-19 vaccine requirements for federal workers and large companies, becoming the first state to mount a legal challenge to the administration's newest rules. In a 14-page complaint filed with a federal district court in Arizona, Attorney General Mark Brnovich argued Mr. Biden's new vaccine requirements unconstitutionally discriminate against U.S. citizens because undocumented immigrants apprehended by federal law enforcement are not subject to a federal vaccination requirement. The attorney general said [the policies] are an "egregious" violation of the Constitution's Equal Protection Clause. "Unauthorized aliens will not be subject to any vaccination requirements ... while roughly a hundred million U.S. citizens will be subject to unprecedented vaccination requirements," the state told the court. Brnovich ... is asking the court to declare the new vaccination policies unconstitutional and block the Biden administration from imposing COVD-19 vaccine mandates on U.S. citizens or legal residents that differ from those applied to undocumented migrants. Mr. Biden announced last week his new vaccination requirements. In addition to signing executive orders requiring all executive branch federal workers and contractors to be vaccinated, the president also said the Department of Labor would be developing an emergency rule to require all employers with at least 100 employees to mandate their workforce be fully vaccinated.