More precise classification: adjective derived from past participle form of the verb "presume".
Translations
The presumed winner of the election gave a victory speech even before all the votes were counted.
Le vainqueur présumé de l’élection a prononcé un discours de victoire avant même que tous les votes aient été comptés.
supposéEmploi plus général, quand l’idée de présomption est exprimée comme une simple supposition. Accepted as true or existing based on probability or assumption, without definitive proof. The presumed winner of the election gave a victory speech even before all the votes were counted.