This means a drop of seven points with respect to the data published on September 1, revealed the most recent poll by the firm Cadem.
As the contents of the text became known, the number of those who will vote against the proposal increased from 53 to 57 percent.
The Constitutional Council, where the extreme right and the conservative right have an absolute majority, began to vote in plenary session on more than a thousand amendments made to a draft written by a commission of experts.
Many of these amendments limit labor and individual rights and raise private health and social security services to constitutional rank, among other measures considered here as a setback to democracy.
The survey also revealed that the image of the ultra-right-wing José Antonio Kast, leader of the Republican Party, fell nine points to 43 percent.
On the other hand, approval of the work of President Gabriel Boric grew discreetly and is at 31 percentage units.
In terms of economy, 68 out of every 100 Chileans consider that it is on the wrong track and only 26 foresee a positive direction.
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