"So long Lone Start State! You are but tiny star set against the vast colossal sky of Mother Russia!"
Texas has vast uninhabited rangeland, but most of it has owners. Trouble is, it's potentially habitable, and vulnerable to invader usurpation for housing, in contrast to the empty lands of Russia and Australia. Good thing it's surrounded by Texans with guns.
Population density of Texas: 103 people per sq. mile.
Population density of Russia: 8.4 per sq. kilometer (22 people per sq. mile).
Population density of Australia: 3.45 per sq. km. (approx. 10 per sq. mile).