This week America's Federal Railroad Administration requested Buy America rules be waived on certain parts for the California High-Speed Rail Authority (CHSRA) rolling stock due to lack of manufacturing capability in the US.

A public consultation is on-going prior to final decision but a president has already been set on Amtrak's fleet. 

CHSRA has stated this as only a temporary fix until the US can deliver the 100% domestic content the Buy America terms require. However to meet tight timescales and quality parameters this is unlikely to be achieved in the short term.