Jon Lieber, managing director for the United States at Eurasia Group, shares his insights on US politics:

How is coronavirus jeopardizing the legitimacy of a 2020 presidential election?

Well, what coronavirus is doing is a lot of states are worrying about people who aren't going to want to come to the polling places in the fall, and they're worried about a shortage of polling workers who are going to want to come out and volunteer to get sick by interacting with a bunch people in person. So, what they're doing is they're looking at making a shift to vote-by-mail. Most states allow some form of absentee balloting today. Five states just automatically mail you a ballot and they don't do any in-person voting. But the challenge here is that a lot of states are unprepared for the sharp increase that's expected. In the last election, 25% of ballots were cast by mail. You may see 50, 60 or even more percent of ballots cast by mail this time, which could overwhelm election administration, which happens at the state level.