Florida Gov. Ron DeSantis on Thursday sued the Biden administration over its vaccine mandate for federal contractors in a lawsuit alleging the president overstepped his legal authority.

“The federal government is exceeding [its] power and it is important for us to take a stand because in Florida we believe these are choices based on individual circumstances,” the Republican governor said in a statement.

The 28-page lawsuit, filed in federal court in Tampa, argues that the administration has no legal grounds to mandate such a sweeping requirement and that Biden’s rule violates procurement law.

The state is seeking an immediate injunction to the rule, which is slated to take effect Dec. 8.

DeSantis, a staunch Trump ally who’s considered a likely 2024 presidential contender, has opposed Covid-19 restrictions at the state, local and federal level. He has prohibited mask mandates and banned businesses from requiring proof of vaccination.