The line being pushed by the US Democrats is that climate change is the root cause of the migration to America from Central America. This is indeed a case of bs baffles brains, as the saying goes. It is absolutely obvious that these are not climate change refugees, like, say, hypothetical people on a hypothetical island that is suddenly flooded by mystical, mythological sea level rise. These are people out to move to a First World country, fast becoming as Ann Coulter puts it in her book, Adios America (2015), a Third World hellhole, to get what they can, and better themselves. Who can blame them, if Americas lets them in? The Democrats have it as part of their racial white genocide/Great Replacement agenda, and to cement Democrat rule forever, or until a Latino party replaces them, hoisting them by their own immigration petard.
https://www.breitbart.com/politics/2021/04/23/kamala-harris-vows-to-fight-climate-change-as-root-cause-of-migration-crisis/