Would not have to if the governments would stop handing out goodies and perks as well as fine employers who hire them.
Illegals get all of the goodies (except voting, but they do that in large numbers anyway) and none of the responsibilities. No wonder they are such reliably Democrat voters.
My son-in-law, meanwhile, is still a Japanese national who married my daughter in 2007 and applied for U.S. Citizenship. After considerable application process and expense, they finally granted him a residency green card in 2010 but no citizenship yet. Could it be because he fits the profile of a reliable GOP voter?