No not by Congress in the case of a Constitutional Convention. Plus the "approval by the states would be done the original way, by Con-con's in the states, not by the state legislatures.
Remember the original Con-Con was called to "amend" the Articles of Confederation, instead they wrote a new Constitution and re-wrote the "unamious" requirement from the AoC for amendments into 9 of 13 states approval for the new Constitution.
This is why I fear a runaway “kangaroo convention” so much. If the military and police are given a “new constitution” to swear to defend, they are off the hook and can proceed with gun confiscations etc.
IMHO, this would split the military and lead directly to some type of dirty civil war.
Of course, if BO’s entire covert goal was to destroy the evil imperialist capitalist USA, this would be an ideal means to do so.
In that case they don’t need to divide and conquer, but only to divide and let the USA self destruct.