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President of the United States Senate |
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![]() Official seal |
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| Style | Mr. President (Within the Senate) |
| Inaugural holder | John Adams April 21, 1789 |
| Formation | U.S.
Constitution March 4, 1789 |
| Succession | Second |
| Website | Vice President Joe Biden |
The Vice President of the United States is designated by the Constitution as, ex officio, President of the United States Senate. However, during a vacancy in the office (such as that caused by death, resignation or presidential succession), the President pro tempore of the United States Senate serves as the permanent President of the Senate. Until the ratification of the 25th Amendment to the United States Constitution, there was no mechanism to replace a Vice President until the next presidential election.
This list includes individuals (both Vice Presidents and Presidents pro tempore) who served as a Presiding Officer of the Senate (not including senators who presided over sessions temporarily in the place of the sitting President).
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