In Wednesday’s third and final presidential debate, Donald Trump made history by becoming the first major party candidate to refuse to say whether he would honor the election’s outcome if he loses. A day later at a rally in Ohio, he told supporters he would accept “a clear election result” but would reserve his right “to contest or file a legal challenge in the case of a questionable result.” Trump didn’t say what might qualify as a “questionable result.” But he’s made it clear that he already thinks the election is rigged against him. It’s almost universally agreed that is a virtual impossibility. Unfortunately, the electronic voting machine millions of Americans will use to cast their ballots can be rigged, and thanks to outdated technology it will be difficult to prove they weren’t if Trump or his supporter put forth such a claim. Verified Voting, a nonprofit group dedicated to providing information on elections, said eight out of ten Americans will cast their ballot this year on an electronic voting machine that produces some form of hard copy record of their vote. But that leaves over a dozen states in this election cycle using a direct recording electronic (DRE) machine — often a button-based or touchscreen device used for recording vote counts — which don’t support paper audit technology. In several key battleground states, electronic voting machines with paper audit trails are virtually non-existent.