Speaking to Shems FM radio, Rachid Ghannouchi said:
We were not favourable to a postponement of the municipal elections but there are objective reasons for a delay.
Ghannouchi explained that the electoral commission was expected to announce a new date this week with the likelihood of it being in March 2018; however Ghannouchi's comments are yet to be confirmed.
The electoral commission initially confirmed that the country's first municipal elections since 2011 would take place on 17 December however that date was changed following consultation with the government, political parties and civil society groups.
The Ennahda party is the ally of Nidaa Tounes, founded by current President Beji Caid Essebsi, both of which make up the majority in Parliament.
The municipal polls are expected to consolidate the country's political transition as a young democracy, after the adoption of a new constitution and the 2014 legislative and presidential polls.
The government recently announced a cabinet reshuffle to make it more representative of Tunisia's political framework with the hopes of ending months of in-fighting.