Colin Stretch’s days at Facebook are numbered, but that hasn’t stopped him from worrying about the impact of companies like his ahead of Tuesday’s midterm elections in the United States.

Stretch, Facebook’s general counsel in Washington, D.C., since 2013, has plans to leave the media and technology company at the end of 2018. Speaking on a panel at the American Bar Association’s 28th annual review of national security law on Friday, he said “election integrity generally, not just here but around the world” remains the issue that keeps him up at night and concerns him most regarding social media and national security.