See below for examples of how gerrymandering works: districts in Indiana are carved into all sorts of shapes in order to favor whatever party is dominant in the State House each time (at 10-year intervals) the census is taken.
The last time this happened was in 2010 and the Republicans were dominant. They gave us a State Senate which is 82% Republican (41 members) and only 18% D (9 members). The numbers are only slightly less out of whack in the House whose 100 members are divided into 70% Rs and 30% Ds.
This is what gerrymandering gets us: a supermajority - and a distribution which does not fairly represent the citizens of our State.