Yes, Letters between the founders explaining why it was important. But that will not save the Nation. The truth has no traction on this issue.
Some of that evidence is enumerated in this thread
https://freerepublic.com/focus/f-news/2840767/posts
https://www.art2superpac.com/issues.html#Constitutional%20Convention
https://puzo1.blogspot.com/2015/03/a-response-to-neil-katyal-and-paul.html
One more, spelling out communications between Founders
http://www.politijim.com/2016/01/about-that-lie-that-scotus-never.html
People are getting mighty ready for the truth. This needs to be brought before SCOTUS and I have little doubt they will judge Constitutionally. None of the cases against 0bola’s NBC status were heard by any judge, they were all refused, so it never made it to SCOTUS.
Now is a good time.
Thanks for those links, brings back memories of the “Birther” threads which I obsessively read.