Ah, respectfully disagree. They do care. The rinos care very deeply about cheap labor; this is important to them so the money keeps rolling in from lobbyists (largest one is the COC), big biz, & other rich donors. The libs care very deeply about not only the money but all those lifetime democratic voters.
Generally, liberals think of the Constitution as outdated & irrelevant. Likewise, in their minds, America's sovereignty is not defined by its borders.