2020 candidates lean on virtual town halls as coronavirus spreads

What they're saying:

• Biden: "I'm sorry this has been such a disjointed effort here because of the connections," he said after answering a question about protecting endangered species.
• Sanders: "We do more rallies than anybody else, and [they're] often very well attended. I love to do them," Sanders told reporters at a hotel in Burlington. "This coronavirus has obviously impacted our ability to communicate with people in the traditional way that we do. That's hurting."

Flashback: Louisiana was the first state to delay its primary in response to the novel coronavirus. The contest has been moved from April 4 to June 20.

Go deeper: Democratic primaries in flux over coronavirus concerns