How Can We Protect Our Elections From Meddling And Hacking?

The fallout continues over alleged Russian interference in U.S. elections and what appears to be an ongoing online campaign to divide public opinion.

Intelligence officials say this year's midterm elections are a target of a sophisticated so-called "troll factory" that created fictitious social media accounts to try to influence public opinion.

Many state election officials are concerned and some say they're not getting enough help or clarity from the federal government about how to protect voting and voter information.

William Galvin, secretary of the commonwealth of Massachusetts. He tweets @secretaryofmass.

Bruce Schneier, security technologist, fellow at the Berkman Klein Center for Internet & Society and author of "Data and Goliath: The Hidden Battles to Collect Your Data and Control Your World." He tweets @schneierblog.

Eric Rosenbach, co-director of the Belfer Center at Harvard's Kennedy School and former assistant secretary of defense. He tweets @erosenbach.