Tonight, the first of two scheduled presidential debates will be held between President Biden and former President Trump. And that’s the way it should be. Although the vast majority of voters have likely made up their minds, seeing them on the same stage answering questions on voters’ minds will provide insight, especially for those still uncertain which way to go. And, in a race expected to go down to the wire, those few votes may spell the difference. But even in races that are not expected to be close, everyone on the ballot owes it to the voters to take part in at least one forum with their opponent. This year’s ballot includes two such races—the U.S. Senate race between incumbent Democrat Tim Kaine and Republican challenger Hung Cao; and the 1st Congressional District race between incumbent Republican Rob Wittman and Democratic challenger Leslie Mehta. In both of these races, the incumbent appears heavily favored to win. A savvy politician would seek to avoid any one-on-one debate...