If enough support for a Convention of States can be mustered, ^who appoints^ those that will be voting on any actions by the formally convened Convention?
They will be state legislators. There is no ‘convention’, that is a slur against the movement. Enemies of the movement call it a ‘Constitutional Convention’; it is not.
What it is, is a communication protocol among state legislators to meet and agree on topics and language for amendments. The state legislators involved are by and large much, much more trustworthy than any legislator in Congress. They are closer to the people and they are more conservative in general.
Article V allows for amendments to be proposed either by Congress or by states. The President can propose to Congress but it is not formal, not recognized by the National Archives until it is submitted either by Congress or by 2/3’s of state legislatures.
Ratification can occur either by states or by state assemblies of state residents ‘citizens’. There is a precedent to this in the 17th Amendment. But the pols at the time in DC saw this as a threat to their power and told state legislators that they would ‘honor the wishes’ of the states and take it in-house to Congress. Once Congress took over, they reworded the intent of the people of the states to give us the 17th Amendment which destroyed state power in Congress.
Here’s an important takeaway should someone decide to join and support the Article V movement, DO NOT ALLOW CONGRESS TO WRESTLE AWAY FROM THE STATE LEGISLATORS THE PROPOSED AND INTENDED CONSTITUTIONAL AMENDMENTS.
Note that the National Archives plays a very important role here.
Two paths to the National Archives (NA):
++++> 2/3s State Legislatures send application to NA
++++> 2/3s both chambers of Congress send application to NA
Congress views the first pathway to the NA above as a threat to their power. State legislators are more conservative and closer to the people than is Congress. Whenever the first pathway makes news, it is slammed and maligned as radical and dangerous.
In the Article V process the President is bypassed, never in the loop unless the White House asks Congress to consider a proposal written by the WH.