>>> alabama is another key state on super-tuesday. minority voting rights have been a biggish dwlu. let's get more from andy gallagher. why have the mechanics of voting been such a big issue there? >> reporter: there is a focus on african american votes, and here in alabama that's especially relevant, a quarter of the population is african american. in wilcox county where we are now, it's more like 50% or more. you now have to produce government issued photo id. photo id required signs are all over the place. it doesn't sound like an unreasonable request, until you realize that rural communities people are very poor. they don't have public transportation, they don't have access to information, and they

can vote in the state of alabama. >> reporter: a recent challenge to the picture id law was rejected by a judge, but civil rights activists say they will continue to campaign for change. >> reporter: it's worth noting that those new voter id laws aren't just restricted here to the state of alabama. notably texas where there are 155 delegates have some of the harshest voter id laws in the country. and all of this came about after a supreme court ruling which basically disassembled part of the 1965 voting right's act. why that is so important on a day like this, is because the majority of the people effected would vote democratic. that's what makes this a key issue. hillary clinton itself called the law here a blast from the jim crow past. she says if she wins she will extend voting rights. here officials say any accusations that they are trying to stop or suppress black votes is simply ridiculous.