How is defending our borders from an invading horde of illegals be domestic law enforcement? Only way to stop an invasion is to repel them with force. After a few 1000 bodies left just south of the border, the illegals and liberals would get the message that We the People don't want criminals here anymore.
First of all, "invading horde" is a silly characterization. Secondly, I am pretty sure ICE is a law enforcement agency. Third, if this is an invasion, who is it an invasion by? Fourth, why would the only bodies be south of the border? Do you think no illegals enter the country through the Canadian border? Fifth, I'd say there is no realistic chance that the federal government will authorize using lethal force on someone simply because they enter the country illegally (ignoring whether such an order would be deemed legal/Constitutional). Finally, I did not say that Posse Comitatus was necessarily the argument being made, merely that is might be.