And just how are the parents not subject to a foreign government?
I lived in Canada for seven years with their equivalent of a Green Card. While I was subject to laws of residency in Canada, as a US citizen, I was most certainly subject to US jurisdiction. I registered for the Selective Service and I sent income tax returns to Philadelphia.
I would suggest that refugees, like those from Cuba, would not be subject to the Cuban government, even if Clinton’s goons thought so. If you go from the US to Canada and maintain US citizenship, pay US taxes, and register for the US military, then you are subject to the US government. If you leave the US for Canada with not intention to go back and stop paying taxes to the US, then you are renouncing your right to be subject to the US government. Its very simple.