

Generally speaking, the best bet is French due to the large community of speakers (including also Belgium, Luxemburg and Québec), the relative ease of getting French to a usable level, and its usefulness and sought-afterness even outside of francophone countries. Next up would be German with its even larger community of speakers in Europe and economic relevance but higher difficulty. Third I’d say is Spanish, since learning it will also make Italian intelligible to you.
If things get worse in the US, some people who are affected particularly gravely (e.g. trans people) might even be eligible for asylum, which would remove the language requirements (but I’m only speculating here).
I suspect though that there are already a lot of applicants, given that Ireland is the only remaining country in the EU that has English as its main language, so the competition may be especially hard. But that’s not to say it’s impossible.