The 14th Amendment to the Constitution was specifically written to guarantee citizenship for the children of slaves and was never intended for foreigners. This was clearly stated by its principle authors.
Birthright citizenship for the children of illegal aliens causes massive & never ending chain migration that costs American taxpayers billions of dollars annually and does immense damage to this country as a whole.
Only one other first world nation employs this insane immigration policy (Canada) and they are working vehemently to change that policy.