This was written a month after the Constitution was submitted to the several States for Radification. The last State, Rhode Island, accepted it on May 29, 1790.
Madison's report was written in committee Dec., 1799 and presented to the General Assembly of Virginia, Jan. 7, 1800.
What does Madison's letter concerning a yet to be Ratified Constitution have to do with what Madison said about the State's obligation to the federal authority over a decade later?
-----
Did Madison actually write “12th amendment”?
No. as I said, it was just a typo.
-----
I thought it might be an historical anomaly along the lines of “One small step for man. One giant leap for mankind”.
No, just a short walk to the Secretary of State's office, as Madison was Jefferson's Secretary of State (1801–1809).
“What does Madison’s letter concerning a yet to be Ratified Constitution have to do with what Madison said about the State’s obligation to the federal authority over a decade later”?
Like a lot of cons I am all about original intent. That letter was Madison’s very thinking at the very moment that the constitution was written. We are talking about the very two people you claim to use to support your argument. You can not dismiss it. Maybe Madison experienced buyers remorse in later years but this document has to be the one that Madison opinion’s regarding states rights has to turn on due to its timeliness regarding the constitution.