Just four days after her Senate confirmation, U.S. Solicitor General Elizabeth Prelogar will argue in the U.S. Supreme Court that the federal government has the right and obligation to sue the state of Texas in an attempt to block one of the most restrictive anti-abortion laws in the nation.

Prelogar was acting solicitor general from January until August when she stepped aside to await Senate action on her nomination to the top post by President Joe Biden. She will face two lawyers—one representing Texas and the other, counsel to intervening private individuals—who contend the United States has no “standing” to sue and no cause of action under the Constitution.