This is easily one of the most eyebrow-raisingly dangerous things I've ever seen a leader of any kind (business or political) in the US say out loud. It summons images of the USA on fire from coast to coast in riots.
Heck, why not spin up YC Foundries elsewhere in the world?
No H1B needed.
Was that a rhetorical question or do you miss the regularly scheduled front page posts complaining that the EU kills innovation?