The vice president of the United States is the second person in the executive branch of the United States, the first heir to the president, and concurrently the speaker of the Senate. Only one vice president is elected in one term. Under normal circumstances, it has no voting right in the Senate. Only when the voting results of the Senate 100 members are tied, the vice president will have a decisive vote. The current vice president of the United States is richard bruce cheney.

The vice president of the United States is the first heir to the president. Once the president dies, resigns or is removed from office, the vice president immediately succeeds, so the vice president has always been called "only a heartbeat away" from the president. In American history, eight vice presidents succeeded because the president died in office, and only 1 (Gerald Ford) succeeded because the president resigned. Because no president was removed (Richard Nixon resigned himself) and no vice president succeeded him.

The vice president of the United States is also the speaker of the United States Senate. When the voting result of the US Senate is tied, the vote of the Speaker of the Senate becomes the most crucial vote.