Paperless voting machines are a glaring weakness in U.S. election infrastructure.<br />Experts say they are dangerous because they lack paper voting records.<br />Politico reports the machines are vulnerable to malfunctions or intrusions that could undetectably change votes.<br />Top U.S. intelligence officials are predicting the return of Russian hackers in 2020.<br />What is preventing counties across the US from upgrading their voting machines?<br />Many counties do not have the money to upgrade voting machines.
