The number of scientists I know that refuse to attend a conference in the US until the policies are changed back is growing. Attendance at the Euro Geosciences Meeting (next week) is at an all time high.
This is a good article:
"Combating global warming requires international cooperation, multinational agreements and rules. Done right, no country is exceptional, and some might have to sacrifice for others. In other words, it strengthens the international order that Trump and his team are so assiduously trying to dismantle in the name of “America First.”