This constituent assembly will not happen, because the steps to get there are long and complicated (nobody in Petro's government has read the current constitution so they don't know this) but this will just fuel/prove correct the right's castrochavista nightmares and everyone else's concerns about his erratic, mercurial bargain-bin populistic strongman delusions. Petro is going to waste the remaining two and a bit years of his term in pointless self-victimizations, Twitter fights, delusional visions, demagoguery and populist speeches blaming everyone for his own incompetence and inability to govern.
https://www.constituteproject.org/constitution/Colombia_2015Article 376
By means of an Act approved by the members of both Houses, Congress may direct that the voters participating in the popular balloting decide if a Constituent Assembly should be called with the jurisdiction, term, and makeup that the same law shall determine.
It is understood that the people shall convoke the Assembly, if they approve it by at least one-third of the electoral rolls.
The Assembly must be elected by the direct vote of the citizens through a balloting that may not overlap another. Beginning with the election, the ordinary powers of Congress shall remain suspense while the Constitution is being amended during the term stipulated so that the Assembly may fulfill its functions. The Assembly shall adopt its own rules of procedure.
From TITLE XIII of the constitution. I gather that it requires both chambers of Congress to pass a bill, then the Assembly is called if 1/3rd of voters agree (or is a 1/3rd margin, so 2/rd?), then the representatives are elected and Congress is suspended while they convene. Is that right?