Yes, You can Rig the Election cause "how to hack" the machine is so easy.

The Election Assistance Commission is a total FAIL –  FU AMERICA

more than 40 states are using voting machines there that are at least 10 years

only 60 percent of states routinely conduct audits post-election by checking paper trails. But not all states even have paper records, like in some parts of swing states Virginia and Pennsylvania, which experts say could be devastating.


Hacker demonstrates how voting machines can be compromised

Roughly 70 percent of states in the U.S. use some form of electronic voting. Hackers told CBS News that problems with electronic voting machines have been around for years. The machines and the software are old and antiquated. But now with millions heading to the polls in three months, security experts are screaming about it !!!!!!!!!!
Symantec Security Response, Election Day results could be manipulated by an affordable device you can find online.  “I can insert it, and then it resets the card, and now I’m able to vote again,” said Brian Varner, a principle researcher at Symantec, demonstrating the device.
The voter doesn’t even need to leave the booth to hack the machine.  “For $15 and in-depth knowledge of the card, you could hack the vote,” Varner said.  Symantec Security Response director Kevin Haley said elections can also be hacked by breaking into the machines after the votes are collected.  “The results go from that machine into a piece of electronics that takes it to the central counting place,” Haley said. “That data is not encrypted and that’s vulnerable for manipulation.”  “How big of a hacking potential problem is this?” Villarreal asked him.  “Well, there’s a huge potential,” Haley responded. “There are so many places in the voting process once it goes electronic that’s vulnerable.”
Educational CyberPlayGround: Election Voter Education for Americans