Tusk officially appointed head of Poland's main opposition party

Tusk (64) served as prime minister from 2007-14. After leaving Polish politics he became president of the European Council before becoming head of the European People’s Party, the largest bloc in the European Parliament. Adam Warżawa/PAP

Donald Tusk, the former prime minister, was elected chairman of the Civic Platform (PO), Poland's main opposition party, in a Saturday vote.

Tusk, the only candidate for the post, was supported by 97.4 percent of PO members, Dorota Niedziela, PO's national election commissioner told a Sunday press conference.

"I confirm that the candidate Donald Tusk obtained the required number of votes and was elected chairman of the Civic Platform," Niedziela said.

One of Poland’s most successful politicians and a PO co-founder, Tusk (64) served as prime minister from 2007-14. After leaving Polish politics he became president of the European Council before becoming head of the European People’s Party, the largest bloc in the European Parliament.

Tusk became the acting leader of PO on July 3 following the resignation of Borys Budka. He said at the time that he had decided to return to the domestic political scene because PO is "a team of absolutely special people."

Critics have accused PO of being unable to offer an original alternative to Poland's ruling party Law and Justice, and of only trying to feed off its opponent’s flaws.