由于辩论表现不佳，民主党人考虑取代乔·拜登成为总统候选人，但除非他下台，否则这几乎是不可能的。 Democrats consider replacing Joe Biden as presidential candidate due to weak debate performance, but it's nearly impossible unless he steps aside.

由于乔·拜登的辩论表现不佳，民主党取代他成为总统候选人的可能性再次浮出水面，但除非拜登选择下台，否则这几乎是不可能的。 The possibility of Democrats replacing Joe Biden as their presidential candidate due to his perceived weak debate performance has resurfaced, but it would be nearly impossible unless Biden chooses to step aside. 更换他的复杂过程可能会导致八月民主党全国代表大会之前的政治动荡，从而导致公开代表大会，这在现代美国政治中很少见。 The complex process of replacing him could lead to political upheaval before the Democratic convention in August, causing an open convention, a rare occurrence in modern American politics. 但如果拜登选择不下台，就不太可能有人能取代他。 However, if Biden chooses not to step down, it is unlikely that he can be replaced.