Ah, yeah that explains it. I've heard of the initiative but not any wild claim he will surely cure cancer. If that's all they're basing this loony ass rhetoric on then it's a real shitty attack considering the reality of it all (Trump will surely decrease funding for funding stuff like this, possibly even out of spite for biden).
The wild claim is literally Joe Biden's own words, but sure, call people loony for living in fucking reality.