The 2020 election is vulnerable. Congress needs to guard against attacks starting now.

Earlier this month, Americans across the country went to the polls for the first time since the broad-based political attack Russia perpetrated against the United States during the 2016 presidential election. This was the first national test of the electoral infrastructure in a new era of foreign interference. Despite several alarms bells that were sounded ahead of the vote, in terms of foreign interference, the election was largely a success.

However, we should not interpret this as a reason to let down our guard. Russia is still targeting our democracy, and there is no reason to believe that it will not interfere in the 2020 presidential election.

This article was originally published in USA Today.