The fastest-growing development in the US is a cartel & illegal immigrant controlled "colonia" in Texas that spans 60 sq. miles. That's just the tip of the iceberg, because there are 450 more colonias on territory the US is in danger of losing.  (Please subscribe & share.)

Sources:

https://www.dailywire.com/news/inside-colony-ridge-the-fastest-growing-development-in-the-u-s-is-a-magnet-for-illegal-immigrants

https://www.fanniemae.com/media/37566/display

https://dailyyonder.com/analysis-what-are-colonias-and-how-can-we-improve-housing-options-for-their-residents/2022/02/02/