An additional section from the page provided that I found odd:

[Mr. Cowan] (Sen from PA)

"So far as the courts and the administration of the laws are concerned, I have supposed that every human being within their jurisdiction was in one sense of the word a citizen, that is, a person entitled to protection; but in so far as the right to hold property, particularity the right to acquire title to real estate, was concerned, that was a subject entirely within the control of the States.

It has been so considered in the state of Pennsylvania; and aliens and those who acknowledge no other allegiance, either to the State, or to the General Government, may be limited and circumscribed in that manner.

I have supposed, further, that it was essential to the existence of society itself, and particularly essential to the existence of a free State, that it should have the power, not only of declaring who should exercise political power within its boundaries, but that if it were overrun by another and a different race, it would have the right to absolutely expel them."