总结：拜登于周日决定退出 2024 年总统竞选，这是在包括参议院多数党领袖查克·舒默和 30 多名众议院议员在内的国会民主党人的巨大压力下做出的。81 岁的拜登在 6 月 27 日与前总统特朗普的辩论中表现不佳，以及关于其年龄和心智健康的持续质疑后，一直抵制让他下台的呼声。他在 11 月 5 日选举前几个月做出这一决定，且支持副总统卡玛拉·哈里斯竞选。

• 词汇：

presidential race：总统竞选

congressional：国会的

majority：多数

persistent：持续的

fitness：健康

trigger：引发，触发

• 原文:

President Joe Biden's decision to drop out of the 2024 presidential race on Sunday came after heavy pressure from congressional Democrats, including Democratic Senate Majority Leader Chuck Schumer and more than 30 House lawmakers.Biden, 81, had resisted calls to step aside that grew almost daily following his poor performance in his June 27 debate with former President Donald Trump and persistent questions about his age and mental fitness. His decision comes just a few months before the Nov. 5 election.Biden backed his vice president, Kamala Harris for the top of the ticket -- triggering many others in the party to issue statements backing Harris.