Can Trump be boring? Can Biden be forceful? Undecided voters await Thursday debate

President Joe Biden and former President Donald Trump will get a crucial opportunity to reach undecided voters and set the terms for the 2024 presidential campaign at Thursday night’s debate in Atlanta.

Partisans on either side have already made up their minds about which candidate they’ll support. And with this year’s race serving as a rematch of 2020, many Americans have already formed strong and possibly unchangeable opinions about the candidates.

Yet there is a sizable...