Ironically, it was mainly the states under the greatest Republican control in the early 2000's that started adopting the use of touchscreen machines without the audit trail.
At the moment, the mainstream press is avoiding this topic, though a The Nation article debunking the case for electoral fraud followed an earlier article and some debate on the subject.
For now, the Bernie supporters are running with this one, but we can expect the Trump campaign to pick this up and make their "crooked" Hillary allegations later this year if Bernie supporters and the candidate himself fall in line behind Clinton at the convention. Maybe the authors of the paper can subject their paper to critical peer review in the meantime while they continue their search for alternative explanations of the data. At the moment responsible academics do not appear to be taking this paper seriously, but the conclusion is too juicy for this not to nose its way into the mainstream media in the next few weeks. Bernie Sanders is the one person who could nip it in the bud, but he is trying to hold on to as much power as he can at least through the convention, so he is likely to remain quiet until then.