It's already going down:

http://www.frommers.com/tips/miscellaneous/the-travel-press-...

http://www.nydailynews.com/new-york/seek-foreign-flights-nyc...

I am seriously considering changing my vacation destination this year from New York to someplace else.

We love New York and want very much to visit some places we haven't had the chance in other trips, but my girlfriend doesn't speak english and something like that would be tremendously traumatic for us.

I know at least a friend who cancelled a trip to the USA fearing immigration problems.

Implication being that Trump's hand was in this fuck up?

Dude, seriously: customs needs no help to suck more at their job. This shit has always happened.