A high-ranking senator of the majority party who presides over the US Senate in the absence of the vice president.
- ‘Elected to the state assembly in 1904 and the state senate in 1908, he became that body's youngest president pro tempore in 1911.’
- ‘An aide to the Democrat disputed this account, saying that Byrd had been offered information on the succession process last June, when he became president pro tempore of the Senate after the Democrats assumed control of the upper house.’
- ‘Another civil unions supporter, Vermont state senate president pro tempore Peter Shumlin, called me after the senate passed the bill.’
- ‘Next in line, the president pro tempore of the Senate and then the cabinet officers in the order specified by the act.’
- ‘The occasion was the traditional election of the Senate's president pro tempore, or assistant presiding officer, who is second in line of succession (after the lieutenant governor) to the governorship.’
- ‘He served for 11 years - always as president pro tempore.’