I entered the U.S. as a minor (16 years old) in 1989 and went to high school and college in the U.S. After graduation I decided to regularize my situation, so I returned to Mexico in 2005 and applied there for a visa. I was, instead, impossed a bar of 10 years (until 2015) in order to be re-considered.
In the meanwhile I have lived in Germany with my wife and children (my wife has never been in the U.S illegally). Since then I also acquired German citizenship. My two children (3 years old and 6 months, respectively) have German citizenship. So, all of us are German citizens.