I generally think non-Americans should, for the most part, stay out of American politics, for obvious reasons. However this is an area where I do think we get an opinion.
Despite whatmany Americans seemingly want to believe, this isn't your planet, you are no more important than any one else and if your (potential) leaders are going to pursue policies that will destroy all the rest of the worlds efforts to combat climate change. This is our planet too and we shouldn't be expected to sit back and take it while Trump, or any other American president destroys it for us.