Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The Czech Social Democratic Party (ČSSD) leadership election of 2005 happened when incumbent Vladimír Špidla resigned as a result of party's poor performance in European Parliament election. Stanislav Gross and Zdeněk Škromach duelled in the election. Gross was front-runner and was endorsed by 12 regional organisations while Škromach was supported by only 1 region.
Gross defeated Škromach when he received votes of 291 delegates. 552 delegates were allowed to vote.