This could be a case where gene drive extinction solutions could work safely. There aren't any native species in the Americas with which either a feral pig, o

This could be a case where gene drive extinction solutions could work safely. There aren't any native species in the Americas with which either a feral pig, or a European wild boar, can interbreed, and controlling gene flow from wild stocks into domestic pigs shouldn't be very difficult, since essentially all domestic pig breeding is controlled breeding with known sires. You would definitely want to have controls to make sure the gene drive wasn't exported to Eurasia, but that seems doable.