J. Alex Halderman, professor of computer science & engineering at the University of Michigan, explains how Michigan's voting equipment could be suseptible to manipulation and hacking without an internet connection. Chad Livengood, The Detroit News.
How might a foreign government hack America’s voting machines?
Here’s one possible scenario. First, the attackers would probe election offices well in advance in order to find ways to break into their computers. Closer to the election, when it was clear from polling data which states would have close electoral margins, the attackers... READ MORE HERE.
There is also a short video of the press conference at the link above.
For expert analysis of voting issues see The Brad Blog!