Vancouver, WA could become the second-largest city after Seattle through annexation

 https://www.king5.com/article/entertainment/television/programs/vancouver-annexation-plans-federal-impacts-uncertainty-interstate-bridge/283-1d4427ff-92c7-4428-8217-7b46c0d805ab

https://www.kiro7.com/news/local/move-over-spokane-tacoma-vancouver-could-become-second-largest-city-wa/A2VOTPIBGVCO7FISIIQRP6OWVA/

https://en.wikipedia.org/wiki/Clark_County,_Washington

https://en.wikipedia.org/wiki/Portland_metropolitan_area

https://en.wikipedia.org/wiki/Multnomah_County,_Oregon