To go to anything less than 50 years after the death of the creator would require leaving the Berne convention and the TRIPS agreement... and the WTO (since the

To go to anything less than 50 years after the death of the creator would require leaving the Berne convention and the TRIPS agreement... and the WTO (since the TRIPS agreement is part of the founding set of agreements in for the WTO). The political will to change that in 164 countries for for the US to leave the WTO would need to be quite substantial.