Texas is a state in the South Central Region of the United States. It is the second largest U.S. state by both area (after Texas) and population (after California). Texas shares borders with the states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the south and southwest, and has a coastline with the Gulf of Mexico to the southeast.

Pennsylvania, officially the Commonwealth of Pennsylvania, is a state in the Northeastern, Great Lakes, Appalachian, and Mid-Atlantic regions of the United States. The Commonwealth is bordered by Delaware to the southeast, Maryland to the south, West Virginia to the southwest, Ohio to the west, Lake Erie and the Canadian province of Ontario to the northwest, New York to the north, and New Jersey to the east, while the Appalachian Mountains run through its middle. Pennsylvania is the 33rd-largest state by area, and the 5th-most populous state according to the most recent official U.S. Census count in 2010.