My guess is that a significant few % of European and Asian holiday makers won’t now travel to the US. Because of the long lead time on long haul holidays, it will take a while to emerge.
Conversely, Trump’s wrecking ball is rapidly lowering the value of the USD, making it better value than for many years. That might balance it out?
I’d still holiday there, despite despising MAGA. Almost all New England and for example DC, also the West Coast is hugely Democrat. Personal views, but I don’t see a reason to ‘punish’ those people.
