English Social Sciences Government / Politics

In an illustration of the "carousel", seven buses came to Kyiv from Cherkasy with people who were supposed to vote with absentee ballots.

There was a whole campaign launched by the authorities that if you vote for Yushchenko, you will lose your job. For instance they were distributing ballots among voters already marked for Yanukovych. An employee had to go and vote and then bring back his clean ballot to his management. This was called "carousel".

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This is a text about the presidential elections which took place in Ukraine in 2004. Any ideas what carousel means here?

Thanks in advance :)