Possible Clues:

• Southern United State on the Gulf of Mexico
• From which you might get oil in USA -- area that's near Mississippi
• Trailer inhabited by poor Sioux having no vote in state
• Two men annexing a state
• New Orleans' state
• State Pierre’s agreement to meet Welsh girl in Hollywood area
• The French expanded in state
• Liberal France’s expression of agreement with troubled Asian state
• 18th of 50
• Oil in USA revived a southern state