The Democratic Leadership Council released a report on the negative consequences of partisan gerrymandering. By their estimation, as many as 11 million votes might be suppressed because gerrymandered district are uncompetitive. Why vote if you know the result already?
They base their study on an observation that turnout in competitive districts is substantively higher than turnout in non-competitive districts.
Attention is drawn to the "dirty dozen" states where most of this activity occurs. Big surprise: Texas is not among them.