根据美国法律,如果总统缺位(比如在任期因为各种原因死去或者因病完全无法行使职权),副总统就会自然接替成为总统,担任这一世界上最有权势的职位。作为现任副总统的拜登,按照美国法律,他同时还是参议院的议长。如果在参议院投票时出现支持和反对票完全相同的情形,他就可以加入投票,对某些 Under the laws of the United States, if the president is left vacant (for example, died due to various reasons during his tenure or is completely unable to exercise his power due to illness), the vice president will naturally succeed to become the president and assume the most powerful position in the world. Biden, the current vice president, is also the speaker of the Senate under U.S. law. If there is a case of exactly the same vote and vote at the time of the Senate vote, he can join the vote and for some