Jon Lieber, Managing Director for the United States at the Eurasia Group, shares his perspective on US politics - from the Nationals Park in Washington, D.C., where the baseball season began last week, even though it may not last very long.

First question, Trump tweeted about delaying the election. What's the deal?

Well, Trump can't delay the election. Only Congress can delay the election. And Congress is not going to delay the election. Bipartisan agreement here. Election has never been delayed. Not for the Civil War. Not the World War II. Not going to happen in coronavirus. What Trump can do, however, is delegitimize the results of the election in the mind of his supporters by calling into question the efficacy of vote-by-mail, which will be a huge factor in the November election due to the coronavirus. If enough people question the accuracy of vote-by-mail, that may give them grounds for challenging the election results in a close swing state, in a close election in November, which could lead to prolonged legal battles. And even if it doesn't, it could cause a lot of people to question the legitimacy of Joe Biden's presidency, should he win without any contest.