Only a few weeks after he marked his one-year anniversary as Texas’ solicitor general, Scott Keller learned that he is scheduled to appear at the U.S. Supreme Court as Texas’ lead lawyer for a fourth time.

Keller, a onetime student and former aide to the U.S. Senator from Texas and Republican presidential hopeful Ted Cruz, will argue for the state in a controversial case in which Texas has taken on the Obama administration’s proposed immigration reforms.