Loving the USA

Story on NHPR this morning.  Apparently pregnant foreign women (well to do Chinese are mentioned but there has gotta be others) are traveling to the US to give birth here, so that the child will be a US citizen.  There is enough traffic to support  organizations of runners, who make the arrangements (for a stiff fee).  Border patrol is trying to bust them.
   I kept thinking, there has to be something really attractive about the US of A, to prompt pregnant women to travel half way around the world, away from friends and family, to give birth in an alien land, just to obtain US citizenship for the child. We should take advantage of that really attractive something in our dealings with adversaries like Putin and Iran.