Could the 2020 election be postponed? Only with great difficulty.

The date of the general election is set by federal law and has been fixed since 1845. It would take a change in federal law to move that date. That would mean legislation enacted by Congress, signed by the president and subject to challenge in the courts.

To call that unlikely would be an understatement.

And even if all of that happened, there would not be much flexibility in choosing an alternate election date: The Constitution mandates that the new Congress must be sworn in on Jan. 3, and that the new president’s term must begin on Jan. 20. Those dates cannot be changed just by the passage of normal legislation.