In an article describing the influence of voting machine lobbyists in Georgia, the New Yorker explains: 

“The practice of democracy begins with casting votes; its integrity depends on the inclusivity of the franchise and the accurate recording of its will. Georgia turns out to be a prime example of how voting-system venders, in partnership with elected officials, can jeopardize the democratic process by influencing municipalities to buy proprietary, inscrutable voting devices that are infinitely less secure than paper-ballot systems that cost three times less.”

In 2016, 77,704 voters in three states flipped the election from Hillary Clinton to Donald Trump.  That’s just 0.057% of all votes cast.  In our winner-take-all system where a small number of states determine the president, we are incredibly vulnerable to election manipulation.