The Constitutional Convention can only propose amendments to the Constitution. They COULD propose an “amendment” that repeals the entire Constitution and replaces it with a new Constitution, but that would still require approval by two-thirds of both houses and ratification by three-fourths of the state legislatures. That AIN’T GONNA HAPPEN.
Clarification: amendments proposed by a Constitutional convention must only be ratified by 3/4ths of the states. There's no requirement for approval by Congress.
Congress can propose an amendment with 2/3rds of both houses. But, it must also be ratified by 3/4ths of the states.
In either case, I am also skeptical that a large change to the US Constitution would be ratified by 38 states. Only 13 would need to refuse, and I can name nine right away that are almost certain to do so.
McCain won 30 states. No changes will happen. All states are equal in this matter. Alaska = California. Dems hate that.