Sorry, I was off on a tangent and missed your main point. Yes, 63% (I’ve read 57 but that may be an old number) are from Mexico. That may be the case in aggregate or amongst those who are ‘undocumented’ (never had any visa). Either way, I hope enforcement happens against all illegal aliens and not just ones from a specific country. We need interior enforcement.
Yes, we do need interior enforcement, and enforcement should be applied equally to all illegal aliens. However the present manufactured “crisis” is at the Mexico-U.S. border, efforts should be focused there immediately.