Online voting is sometimes heralded as a solution to all our election headaches. Proponents claim it eliminates hassle, provides better verification for voters and auditors, and may even increase voter turnout. In reality, it’s not a panacea, and certainly not ready for use in U.S. elections. Recent events have illustrated the complex problem of voting in the presence of a state-level attacker, and online voting will make U.S. elections more vulnerable to foreign interference. In just the past year, we have seen Russian hackers exfiltrate information from the Democratic National Committee and probe voter databases for vulnerabilities, prompting the U.S. government to formally accuse Russia of hacking. In light of those events, the U.S. Department of Homeland Security may soon classify voting systems as critical infrastructure, underscoring the significant cybersecurity risks facing American elections. Internet voting would paint an even more attractive target on the ballot box for Russian adversaries with a record of attempting to disrupt elections through online attacks.