As the coronavirus spreads, the presidential candidates must face a changing campaign trail.

Joe Biden and Bernie Sanders both canceled campaign events in Ohio this week, and President Trump similarly suspended rallies in Colorado, Nevada, and Wisconsin. Large gatherings are being strongly discouraged, and “social distancing” should be considered the temporary status quo, according to the federal government. This means that traditional campaign tactics — events, meet-and-greets, and town halls — are no longer options.