Re: Must See
The "or a citizen of the United States" was written in 1787 and was in the Constitution to specifically address those who were citizens at the time of adoption of the Constitution but who had been born in England. This was also addressed by the second half.
"….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."
You can’t look at Article II and The 14th Amendment together. The 14 Amendment was ratified in 1868 – long after the applicability of "or a citizen" had run its very narrow course.