Some people have asked for further clarification on why the Constitution’s Necessary and Proper Clause does not grant Congress power to use its convention call to regulate a Convention for Proposing Amendments.
This is a technical area and can be difficult to grasp (or explain, for that matter). You have to understand the nature of the Necessary and Proper Clause, analyze its wording, and put together a variety of judicial rulings.
Accordingly, I’ve expanded my review of the subject. You can find it here.