Wisconsin’s gerrymandering case has garnered national attention. But a little-explored aspect of the suit — the pervasive presence of “Swiss cheese” districts — could have huge ramifications for the outcome.

…Yet when the Wisconsin Supreme Court hears arguments next week in a widely watched lawsuit arguing that the existing maps fail to meet standards set out in the state constitution, that kind of political engineering will not be the focus.

Instead, much of the debate will center on exactly how to interpret the word “contiguous.” And the map shapes that are likely to get attention have elicited comparisons to Swiss cheese.

Fifty-five of the state’s 99 Assembly districts and 21 of 33 in the Senate contain “disconnected pieces of territory,” according to the most recent petition filed with the state Supreme Court by 19 Wisconsin voters. The suit seeks to have the state’s maps declared unfair and redrawn.