Butterfly ballot

A butterfly ballot is one that lists the candidate names on both sides of the ballot, with the check-off boxes descending down the middle. The candidate names are thereby the "wings" of the butterfly, and the boxes for casting the vote are its "body".

The design became well known after the 2000 United States Presidential Election, when it apparently and unintentionally confused some Democratic voters in Palm Beach County, Florida, into selecting Pat Buchanan for President, when they meant to vote for Al Gore (even though there were prominently marked arrows between the candidate names and the appropriate punch hole).