Answer:
Texas
Step-by-step explanation:
This is because Texas was not acquired due to the Mexican-American War but was rather acquired indirectly through the Texas War for Independence. This was due to Texas gaining its independence after the Battle of San Jacinto and governing themselves as a sovereign state for around a decade before joining the United States as a state. The Texans actually joined earlier than California, Arizona, or Utah as those three joined via the Mexican Cession.