Republican presidential nominee Donald Trump and Democratic nominee Kamala Harris met in Philadelphia for the only scheduled debate of this cycle. Rice University political science professor Mark Jones said the vice president baited Trump into exchanges his campaign likely didn't want him to be in.

Photo: Republican presidential nominee, former U.S. President Donald Trump, and Democratic presidential nominee, U.S. Vice President Kamala Harris debate for the first time during the presidential election campaign at The National Constitution Center on September 10, 2024, in Philadelphia, Pennsylvania. (Photo by Win McNamee/Getty Images)