These evangelical advisers aren't the heads of denominations and they don't represent ecclesial authority. They represent only their own interests, which are highly politicized.

You may recall, when Pope Francis made his statement some time back about how those who build walls aren't Christian, I was critical because I thought it was ill-advised for a pope to get involved in the internal politics of a particular nation. I oppose this meeting for the same reason.

I also opposed the pope meeting with Bernie Sanders during the campaign, again for the same reason. I can't speak for anybody else's commentary or lack of it, but that's my position, and it has been consistent.

I hope that helps with your confusion.