With many Greeks exhausted by five years of recession, tax hikes and record unemployment rates, Syriza and its firebrand leader Alexis Tsipras are tipped to win the early elections that must be called, according to the Greek constitution, if parliament fails to elect a new head of state by 29 December.
Nikos Samanidis emphasises that the prospect of power has not blunted the radical nature of the party, despite its meteoric rise from relative obscurity to frontrunner in little over two years.
"The rich, the elites, the markets, the super-rich, the top 10%, yes, they obviously do have reason to worry," he says.
"They will lose their privileges. Our voter base has expanded greatly, but the grassroots, radical nature of Syriza has been preserved thanks to the crisis. Our party has not and will not sever its ties with the streets, with the social movements it arose from."