Accepted SA Offer - International Student

I'm grateful for this forum's advice and recently accepted a SA IBD offer with Jefferies (NYC Office). I'm an international student () at a west coast non-target, and will need to be sponsored to work, which a while back HR said they will do. I won't opine on the election as I'm not American, but it doesn't look good for foreign worker visas from what I understand. I don't know what this means for my future, whether it is earning a full-time offer or if I can even begin work as an intern. I also have a friend who accepted FT at Jefferies NYC who is an international student, who will be starting on OPT with his F-1 for 1 year, then applying for his H-1B Visa. I wanted to ask advice from this forum on specifically:

1) Should we talk to HR soon about transferring to Europe, if worse comes to worse (moratorium on visas, etc.)? Is that even an option at the Analyst level?
2) Will Jefferies pull my offer / what can we do if that happens, given recruiting is drying up?

I'm fully aware this may be a knee-jerk reaction and as a non-American, I don't fully understand how these laws are passed. I would appreciate any advice; I genuinely don't know what to do and want to go forward in a constructive manner. Thanks a lot.