[Stingray51]

"Furthermore, the children born to US citizens born in the Panama Canal Zone are also US citizens and their children, the grandchildren, great-grandchildren and so on will be US citizens."

You are leaving out the residency requirements. For example, a child born outside the USA (such as in the former Canal Zone) to a US citizen mother is not a citizen unless the mother resided in the USA for a certain amount of time prior to the birth. There are different requirements depending upon whether citizenship is derived from the mother, the father or both parents. Over time, as a territory is no longer part of the USA, the chances are high that even US citizen parents will not meet these requirements such that their children will not be citizens.

[Jack Black]

You wrote:

For example, a child born outside the USA (such as in the former Canal Zone) to a US citizen mother is not a citizen unless the mother resided in the USA for a certain amount of time prior to the birth. There are different requirements depending upon whether citizenship is derived from the mother, the father or both parents. Over time, as a territory is no longer part of the USA, the chances are high that even US citizen parents will not meet these requirements such that their children will not be citizens.

Which sounds vaguely reassuring, but then, in the next post you linked the actual page from the USCIS which shows clearly that:

• the sorts of restrictions you discuss above on foreign born US citizenship were largely abolished in a 1986 re-write of the law.
• Under current law there is no difference between the role of mother and father
• under current law only one parent being an American citizen is needed for a child to be a citizen.
• under current law there is no requirement for foreign born citizens to have set foot in the USA to retain citizenship indefinately
• per the link you posted, citizenship is attained simply with almost no restrictions or additional tests when:
• One parent is a U.S. citizen at the time of birth and the birthdate is on or after November 14, 1986

So, under current law we have a growing pseudo-citizen foreign voter problem.

Think about the 1 million Chinese anchor babies whose moms came on the "have baby in USA and get him citizenship" travel plan. All their kids will be US Citizens.