USA TODAY — Russian military hackers said to have infiltrated the U.S. election system would have had several potential avenues to influence U.S. elections — including by tampering with voting rolls, interference that could have had an important impact in swing states. Whether or not this happened isn’t outlined in a leaked National Security Agency report that led to the arrest Monday of a federal contractor with top-secret security clearance. There has been no evidence votes were changed in the 2016 presidential election, though officials in North Carolina are actively investigating attempts to compromise the state’s electronic poll book software. Learn more>>