Results of the opinion poll, conducted by the MRB firm, come less than a month before European Parliament elections are held
More than 157,000 Greek citizens have registered on the relevant online platform so far
An interior ministry audit came in the wake of the mass sending of unsolicited emails by MEP Anna Michelle Asimakopoulou's office to expatriate Greek citizens
Judicial probe underway focuses on Spartiates party's ties with jailed one-time GD top cadre Ilias Kasidiaris ahead of another election