Democratic presidential candidate Kamala Harris and her Republican rival Donald Trump are set to face off against each other in their first -- potentially only -- debate this week, with its outcome expected to substantially impact their final sprint to Election Day in November. The high-stakes 90-minute debate will take place at the National Constitution Center in Philadelphia in the battleground state of Pennsylvania on Tuesday night, as recent polls have shown Vice President Harris and former President Donald Trump in a neck-and-neck race for the White House. Hosted by ABC News, this week's matchup follows the June debate where President Joe Biden woefully performed, exacerbating public concerns about his old age and leading the octogenarian to step aside and endorse Harris as his replacement -- a saga that highlighted the high stakes a televised debate represents. Harris and Trump are likely to lock horns over key election-year issues, including the economy, immigration, national security and abortion, as they have been striving to court swing voters, particularly in toss-up states that will determine the outcome of the general election. Source: Yonhap News Agency