[marktwain]

To the best of my knowledge, that amendment has never been challenged.

The law, with the amended language has been challenged several times (at least nine times).

In six circuits, the law was upheld as constitutional, one of those (First Circuit, 2014) later reversed in another case, leaving five circuits which held the amendment to be sufficient.

In three circuits, the 12 words were held to be insufficient to heal the constitutional defect.

[logi_cal869]

Apologies, I meant at the SCOTUS level.