And so did Germany, Canada, Mexico (here is a brief article).

Addition: Denmark tells transgender citizens to get advice before US trips

Canada should issue a travel advisory for Canadians as well, considering what happened to Jasmine Mooney, a Canadian actress detained by I.C.E.. Doesn't matter who or how successful you are, they will come after Canadians. The president of the US has a hate on for Canadians, and his sycophants are looking to gain his favour, so if we must travel to the US, make sure you have all your paperwork correct before attempting crossing the border. Even then, i think Canadians in the US should be very cautious.

My sleep deprived brain read this as: "Britain's Tissue Travel Warning for US".

What the actual....?!