A raspy and sometimes halting President Joe Biden tried repeatedly to confront Donald Trump in their first debate ahead of the November election, as his Republican rival countered Biden's criticism by leaning into falsehoods about the economy, illegal immigration and his role in the Jan. 6, 2021, Capitol insurrection. Biden’s uneven performance, particularly early in the debate, crystallized the concerns of many Americans that, at 81, he is too old to serve as president. It sparked a fresh round of calls for the Democrat to consider stepping aside as the party's nominee as members of his party fear a return of Trump to the White House. University of Michigan Presidential Debate Expert Aaron Kall echoed that viewpoint of Biden's performance. "The first 15, 20 minutes would be considered probably the worst performance of a candidate, certainly an incumbent, candidate ever," he said.