Researchers repeatedly prove electronic voting machines like in Cook County, Illinois can be hacked to take votes for one and give them to another

Reported here by The Hill, sixteen paragraphs in:

Some voters might welcome the return to punch voting, given that researchers have repeatedly proved the fallibility of individual e-voting machines. One group from Princeton needed only seven minutes and simple hacking tools to install a computer program on a voting machine that took votes for one candidate and gave them to another.