It seems that the technology used for elections in the US is decades old and an easy target for different kinds of attacks. Not upgrading the EVMs increases the possibility of attack vectors on EVMs. So why is Congress underfunding deployment and upgrading new EVMs?
- America's Electronic Voting Machines are scarily easy targets - Wired.com
- The voting technology we really need? Paper. - The Atlantic.
- America's voting technology crisis. - The Atlantic.
- The Insecurity Of America's Old And Underfunded Voting Systems - NPR.
For comparison, India (being the world's largest democracy) has relatively advanced and cheaper EVMs which doesn't cost the government a huge amount of money in terms of cost.