Chestnut is being rescued by a two-pronged approach using hybridization (with a resistant asian species, followed by backcrosses to get something that is mostly American Chestnut) and genetic engineering (introducing a wheat gene that destroys oxalate, which the fungus uses to kill tissue.)
I wonder, does Asia and Europe have nearly as many problems with North American invasive plants / pests / diseases as North America does with its non-natives?
Being from the US, I don't recall any such stories in the news.
Besides the famous case of the chestnut:
Dogwoods are being wiped out, mostly gone in some areas, disease originating from Asia: https://henderson.ces.ncsu.edu/2021/03/native-dogwoods-long-...
Sassafras trees wiped out by Asian beetle causing laurel wilt: https://www.lsuagcenter.com/articles/page1685633928383
American elms largely wiped out by Dutch elm disease (also actually originates from Asia) https://www.invasivespeciesinfo.gov/terrestrial/pathogens-an...
Others in this thread have talked about the threats to ash. It's very disheartening, but I guess it's the inevitable price of globalization.