How will the delegates to the convention be selected if it happens?
Congress would have to adopt rules for delegate selection, as we did in 2015. Back then there was a mix of regional, party, and congressional (senatorial) delegates.
How would the composition of delegates be determined in a majority Labor congress?
I will be the sole appointed delegate and revise the constitution from my dungeon lair.
Truman by himself is the only constitutional convention I really trust, to be honest. I don't even trust myself that much