In this July 14, 2018, photo, Election Systems & Software (ES&S), CEO Tom Burt, right, looks at some of the company's election equipment in the vendor display area at a National Association of Secretaries of State convention in Philadelphia. Experts say top election vendors have long skimped on security in favor of convenience and use proprietary systems, making it more difficult to detect election meddling. (AP Photo/Mel Evans)
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