I think you overestimate the degree to which those 55M people follow any news. My mother's housekeeper has a green card and has zero clue what's going on in US politics. She recently went home to Mexico with absolutely no worries about getting back into the US.

Mexico isn't the worst though. From other Latin American countries it's a lot worse.

I heard Mexico even has a deal with the US that they refuse entry to other latam visitors that they deem suspicious to avoid them going to the US via its land border. This is what a Colombian friend said. Not sure how true though.