Transplanting human brain development into monkeys.
At least it's currently confined to China. Should any of the "uplifted" monkeys get shipped to the U.S. the field of candidates for the Dem presidential candidacy would immediately become a lot more crowded and accusations of speciephobia will be bandied about.
Might be fun to see what happens if you give this treatment to the great apes. Some of them already can use sign language to communicate and teach it to their offspring. The ability to give a coherent stump speech is all that stands between an Orangutan and the White House or at least a House seat.