Actually I think the Convention is a pipedream, unless, of course Trump manages to survive to be elected and has enough of a majority vote to overtop what will be the most intense vote fraud since the USSR and then himself pushes for a Convention. It is otherwise a pipedream because the next president will be a dictator perfected where the current dictator is still not entirely in control. I don't qualify thatby saying the next Democrat because the nature of the office has transformed by Congress ceding all its power to the President directly or through the Agencies. Congress cannot take that power back nor can it be given back. A president that tries to be COnstitutional will be overwhelmed by the Agencies which will become a collective dictatorship and politics thenceforward will be backstabbing battles for control of the Bureaucracy - the Agencies.
How? Ratification is required.