"You can be sure that more people from Glavas's list will come back to the HDZ," said an HDZ official who spoke on condition of anonymity.
The HDZ official said on Monday that this party was in favour of decentralisation, namely fiscal decentralisation and statistical regions but not for political regionalisation.
"Regions will be statistical, but political regions cannot be okayed," the HDZ official said.
Glavas was excluded from the party after the HDZ leadership assessed that the concept of regionalistation was included in the political platform of the civic association 'Croatian Democratic Assembly of Slavonia and Baranja', which he founded.
Glavas and another two MPs, Vladimir Sisljagic and Ivan Drmic, who were also ousted from the HDZ, on Monday informed Sabor Speaker Vladimir Seks that they would set up their parliamentary club of independent deputies.
The ruling HDZ earlier stated that it had ensured a majority in the parliament without those three MPs.
Asked whether it was possible for the HDZ to make a coalition with the Croatian Party of Rights (HSP), the HDZ officials ruled out that option.