A top Homeland Security Department official said Thursday his staff is “working around the clock” to prepare for America’s enemies launching cyberattacks during the home stretch of the midterm elections.

Christopher Krebs, DHS undersecretary of the National Protection and Programs Directorate, said he was feeling “a little nervous” because the U.S. government wasn’t yet aware of any effort to disrupt the midterms but his “paranoid disposition” meant he expected one.