[ByteJockey]

Could be, I suppose. Though for most of those, I'd expect them to have approximately the same impact as voter id laws. The big exception being voter roll purges in states without same day registration, that one seems most likely to have an impact.

> given the narrow margins that we often tend to see.

Most elections really aren't that narrow (hence the high incumbency rate). The few that are just end up dominating the news cycles.