[DMZFrank]

How many people living here when the Constitution was drafted do you think had at least one foreign born parent?

When the constitution was ratified in 1787, every citizen of the USA had been born a British subject. NONE of the first seven US presidents was a natural born citizen. Martin van Buren, born in 1782, was the first. The other seven were waived by virtue of the “grandfather” clause in Article II, Section I, clause 5. To wit:

No Person except a natural born Citizen, or a CITIZEN OF THE UNITED STATES AT THE TIME OF THE ADOPTION OF THIS CONSTITUTION, shall be eligible to the Office of President; neither shall any person be eligible to that Office who shall not have attained to the Age of thirty five Years, and been fourteen Years a Resident within the United States.

Makes it pretty clear to me.

[Verginius Rufus]

The Constitution was written in 1787 but not ratified until 1788. People born in the US after July 2, 1776, when Congress declared independence from Britain, were US citizens. Of course anyone eligible to run for President in the earliest Presidential elections was born well before 1776.

My grandfather's grandfather was born in 1780 but was neither a US citizen nor a British subject. But it didn't matter to him since he never set foot in the United States.