This is largely a moot point unless the US wants to withdraw from TRIPS (and implicitly the WTO) and join the list of countries that don't observe it such as... Eritrea, Kiribati, North Korea, South Sudan, and Turkmenistan.

https://en.wikipedia.org/wiki/TRIPS_Agreement

> Copyright terms must extend at least 50 years, unless based on the life of the author. (Art. 12 and 14)

> Copyright must be granted automatically, and not based upon any "formality", such as registrations, as specified in the Berne Convention. (Art. 9)

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14+14 itself isn't a bad idea, however it also implies that all of the other countries in the WTO agree to it.

Given concerns about companies based in the US being carless with copyright, that might be a hard sell.