Look: I, a US citizen, born and raised in the United States, holder of a valid state ID and federal passport, with no criminal record, am not confident I could pass through a US border checkpoint right now without being harassed or even detained. (I have been critical of Donald Trump in public, and that seems to be all it takes.)

If *I* am not confident about that, imagine how anyone without those credentials must feel.

If you are organizing conferences, meetings, etc. that require people to pass through those checkpoints to attend, you need to grapple with this. You are asking attendees to take a serious personal risk.