Presidential debate: Who has most to gain — and lose?

Donald Trump and Joe Biden are scheduled to spar in the first of three presidential debates on Tuesday in Cleveland. The debate will be moderated by Fox News anchor Chris Wallace and cover a broad range of topics, including the coronavirus pandemic, race and violence in cities, election integrity and the economy.

The face-to-face meeting comes at a time when Biden holds a consistent lead in both national and swing-state polls. Barring any unexpected changes in the state of the pandemic or the economy, the debates likely represent President Trump’s...