[Mark17]

He added that the US would begin "cutting off, or substantially reducing aid" to three Central American countries.

Sadly, this may be about the ONLY thing that gets their attention. Go for it.

[cyclotic]

In addition to cutting off aid, all USPS mail to and from Mexico, Honduras and El Salvador should be cut off. It probably takes congressional action, but all flights, package delivery and telephone should also be cut.

Make them all personae non-grata